Harbor Freight Tools (670cc) Product manual

Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference.
REV 15e
Using an engine indoors
CAN KILL YOU IN MINUTES.
Engine exhaust contains carbon monoxide.
This is a poison you cannot see or smell.
NEVER use inside
a home or garage,
EVEN IF doors and
windows are open.
Only use OUTSIDE
and far away from
windows, doors,
and vents.
Visit our website at: http://www.harborfreight.com
Email our technical support at: productsupport@harborfreight.com
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright© 2013 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Table of Contents
Specifications.............................................. 2
Safety��������������������������������������������������������� 3
Setup........................................................... 6
Operationr��������������������������������������������������� 16
Maintenances���������������������������������������������� 20
Troubleshooting.......................................... 24
Warranties.................................................. 26
Parts Lists and Diagrams........................... 28
Specifications
Displacement
Engine Type
Cooling System
Fuel
Type
Engine Oil
Type
Capacity
Sound Level at 3 feet
Bore x Stroke
Compression Ratio
Rotation viewed from PTO
(power takeoff - the output shaft)
Spark Plugs
Valve Clearance
Speed
Shaft
670cc
Horizontal/Vertical Double Cylinder
4-stroke
Forced air cooled
87+ octane stabilizer treated
unleaded gasoline
SAE 10W-30 above 32° F
SAE 5W30 at 32° F or below
2 Quart
88 dB
78 mm x 70 mm
8.2:1
Counterclockwise
Gap
Intake
Exhaust
Idle
NGK® BPR5ES
Torch® F5RTC
0.7 - 0.8 mm
0.13 - 0.17 mm
0.18 - 0.22 mm
1800 RPM
Shaft
Ø1″ x 3.56″
Keyway
1/4″
End Tapped
3/8″ - 24 UNF
Type
The emissions control system for this Engine is warranted for standards set by the
U.S. Environmental Protection Agency and by the California Air Resources Board (also known as CARB).
For warranty information, refer to the last pages of this manual.
Page 2
For technical questions, please call 1-888-866-5797.
ITEM 61614
WARNING SYMBOLS AND DEFINITIONS
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that
follow this symbol to avoid possible injury or death.
Safety
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Addresses practices not related to personal injury.
RPM
HP
Property or Statement
Revolutions Per Minute
Horsepower
WARNING marking concerning
Risk of Eye Injury. Wear ANSI-approved
safety goggles with side shields.
Read the manual before
set-up and/or use.
WARNING marking concerning
Risk of Hearing Loss.
Wear hearing protection.
Symbol
Property or Statement
WARNING marking concerning
Risk of Respiratory Injury.
Operate engine OUTSIDE and far away
from windows, doors, and vents.
WARNING marking concerning
Risk of Fire while handling fuel.
Do not smoke while handling fuel.
WARNING marking concerning
Risk of Fire.
Do not refuel while operating.
Keep flammable objects
away from engine.
IMPORTANT SAFETY INSTRUCTIONS
Operation
Symbol
Setup
Symbol Definitions
WARNING! Read all instructions.
Failure to follow all instructions listed below may result in fire, serious injury and/or DEATH.
The warnings and precautions discussed in this manual cannot cover all possible conditions and
situations that may occur. It must be understood by the operator that common sense and caution
are factors which cannot be built into this product, but must be supplied by the operator.
ITEM 61614
For technical questions, please call 1-888-866-5797.
Maintenance
SAVE THESE INSTRUCTIONS
Page 3
Set up Precautions
Safety
1. Gasoline fuel and fumes are flammable, and
potentially explosive. Use proper fuel storage
and handling procedures. Do not store fuel
or other flammable materials nearby.
4. Set up and use only on a flat, level,
well‑ventilated surface.
2. Have multiple ABC class fire extinguishers nearby.
6. Use only lubricants and fuel recommended
in the Specifications chart of this manual.
3. Operation of this equipment may create sparks that
can start fires around dry vegetation.
A spark arrestor may be required. The operator
should contact local fire agencies for laws or
regulations relating to fire prevention requirements.
5. Wear ANSI-approved safety goggles, heavy-duty
work gloves, and dust mask/respirator during set up.
7. Fuel tank must be designed specifically for
containing gasoline and must be mounted to a
stable mounting frame. Some areas may have
specific gasoline vapor containment requirements;
comply with local, state, and federal laws.
Operating Precautions
CARBON MONOXIDE HAZARD
Using an engine indoors
CAN KILL YOU IN MINUTES.
Engine exhaust contains
carbon monoxide. This is a poison
you cannot see or smell.
1.
9. Industrial applications must follow
OSHA requirements.
Setup
10. Do not leave the engine unattended when it is
running. Turn off the engine (and remove safety
keys, if available) before leaving the work area.
11. The engine can produce high noise levels.
Prolonged exposure to noise levels
above 85 dBA is hazardous to hearing.
Wear ear protection when operating the engine
or when working nearby while it is operating.
12. Wear ANSI-approved safety glasses
and hearing protection during use.
NEVER use inside a home or garage,
EVEN IF doors and windows are open.
Operation
Only use OUTSIDE and far away from windows,
doors, and vents.
2. Keep children away from the equipment,
especially while it is operating.
13. People with pacemakers should consult their
physician(s) before use. Electromagnetic fields in
close proximity to a heart pacemaker could cause
pacemaker interference or pacemaker failure.
Caution is necessary when near the
engine’s magneto or recoil starter.
14. Use only accessories that are recommended
by Harbor Freight Tools for your model.
Accessories that may be suitable for one
piece of equipment may become hazardous
when used on another piece of equipment.
Maintenance
3. Keep all spectators at least six feet
from the Engine during operation.
15. Do not operate in explosive atmospheres,
such as in the presence of flammable
liquids, gases, or dust. Gasoline-powered
engines may ignite the dust or fumes.
4. Fire Hazard! Do not fill fuel tank while engine is
running. Do not operate if gasoline has been spilled.
Clean spilled gasoline before starting engine.
Do not operate near pilot light or open flame.
16. Stay alert, watch what you are doing and use
common sense when operating this engine.
Do not use while tired or under the influence
of drugs, alcohol or medication.
5. Do not touch engine during use.
Let engine cool down after use.
17. Dress properly. Do not wear loose clothing or
jewelry. Keep hair, clothing and gloves away
from moving parts. Loose clothes, jewelry or
long hair can be caught in moving parts.
6. Never store fuel or other flammable
materials near the engine.
7. Only use a suitable means of transport and
lifting devices with sufficient weight bearing
capacity when transporting the engine.
8. Secure the engine on transport vehicles to
prevent it from rolling, slipping, and tilting.
Page 4
18. Parts, especially exhaust system components,
get very hot during use. Stay clear of hot parts.
19. Do not cover the engine during operation.
20. Keep the engine and surrounding
area clean at all times.
For technical questions, please call 1-888-866-5797.
ITEM 61614
22. Do not operate the equipment with known
leaks in the engine’s fuel system.
23. WARNING: This product contains or, when
used, produces a chemical known to the State
of California to cause cancer and birth defects
or other reproductive harm. (California Health
& Safety Code § 25249.5, et seq.)
24. When spills of fuel or oil occur, they must be
cleaned up immediately. Dispose of fluids and
cleaning materials as per any local, state, or
federal codes and regulations. Store oil rags in
a bottom-ventilated, covered, metal container.
25. Keep hands and feet away from moving parts.
Do not reach over or across
equipment while operating.
26. Before use, check for misalignment or binding of
moving parts, breakage of parts, and any other
condition that may affect the equipment’s operation.
If damaged, have the equipment serviced
before using. Many accidents are caused
by poorly maintained equipment.
Safety
21. Use the equipment, accessories, etc., in
accordance with these instructions and in the
manner intended for the particular type of
equipment, taking into account the working
conditions and the work to be performed.
Use of the equipment for operations different from
those intended could result in a hazardous situation.
27. Use the correct equipment for the application.
Do not modify the equipment and do not use the
equipment for a purpose for which it is not intended.
a. Turn the engine switch to its “OFF” position.
b. Allow the engine to completely cool.
c. Then, remove the spark plug caps
from the spark plugs.
2. Keep all safety guards in place and in
proper working order. Safety guards include
muffler, air cleaner, mechanical guards,
and heat shields, among other guards.
3. Do not alter or adjust any part of the
equipment or its engine that is sealed by the
manufacturer or distributor. Only a qualified
service technician may adjust parts that may
increase or decrease governed engine speed.
4. Wear ANSI-approved safety goggles,
heavy‑duty work gloves, and
dust mask/respirator during service.
5. Maintain labels and nameplates on the equipment.
These carry important information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
6. Have the equipment serviced by a qualified repair
person using only identical replacement parts.
This will ensure that the safety of the equipment
is maintained. Do not attempt any service or
maintenance procedures not explained in this
manual or any procedures that you are uncertain
about your ability to perform safely or correctly.
7. Store equipment out of the reach of children.
8. Follow scheduled engine and
equipment maintenance.
Refueling:
1. Do not smoke, or allow sparks, flames,
or other sources of ignition around the
equipment, especially when refuelling.
2. Do not refill the fuel tank while the
engine is running or hot.
3. Do not fill fuel tank to the top.
Leave a little room for the fuel to expand as needed.
4. Refuel in a well-ventilated area only.
5. Wipe up any spilled fuel and allow excess
to evaporate before starting engine.
To prevent FIRE, do not start the engine
while the smell of fuel hangs in the air.
For technical questions, please call 1-888-866-5797.
Maintenance
SAVE THESE INSTRUCTIONS.
ITEM 61614
Operation
1. Before service, maintenance, or cleaning:
Setup
Service Precautions
Page 5
Set Up
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual
including all text under subheadings therein before set up or use of this product.
Safety
TO PREVENT SERIOUS INJURY:
Operate only with proper spark arrestor installed.
Operation of this equipment may create sparks that can start fires around dry vegetation.
A spark arrestor may be required.
The operator should contact local fire agencies for laws or regulations
relating to fire prevention requirements.
WARNING! DO NOT INSTALL THIS ENGINE ON A VEHICLE.
WARNING! INSTALL THIS ENGINE ACCORDING TO EQUIPMENT INSTRUCTIONS BEFORE USE.
WARNING! If you do not connect a battery to the positive battery cable,
wrap its terminal securely with electrical tape (sold separately).
Setup
Operation
Maintenance
Page 6
For technical questions, please call 1-888-866-5797.
ITEM 61614
Components and Controls
Muffler Safety
Oil Fill
Plug
Lifting
Bracket
Setup
Spark Plug
(1 of 2)
Dipstick
Starter
Operation
Air Cleaner
Lifting
Bracket
Choke
Spark Plug
(2 of 2)
Throttle
Radiator
Circuit
Breaker
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 7
Maintenance
Switch
High Altitude Operation Above 3000 feet
WARNING! TO PREVENT SERIOUS INJURY FROM FIRE:
Follow instructions in a well-ventilated area away from ignition sources.
If the engine is hot from use, shut the engine off and wait for it to cool before proceeding. Do not smoke.
Safety
NOTICE: Warranty void if necessary adjustments are not made for high altitude use.
At high altitudes, the engine’s carburetor, governor (if so equipped), and any other parts that control the fuel-air
ratio will need to be adjusted by a qualified mechanic to allow efficient high-altitude use and to prevent damage
to the engine and any other devices used with this product. The fuel system on this engine may be influenced by
operation at higher altitudes. Proper operation can be ensured by installing an altitude kit at altitudes higher than
3000 ft. above sea level. At elevations above 8000 ft, the engine may experience decreased performance, even
with the proper main jet. Operating this engine without the proper altitude kit installed may increase the engine’s
emissions and decrease fuel economy and performance. The kit should be installed by a qualified mechanic.
High Altitude Kit Parts List - A
Setup
Part
A1
A2
A3
Description
Left Main Jet 3000-6000 ft.
Right Main Jet 3000-6000 ft.
Left Main Jet 6000-8000 ft.
Qty
1
1
1
Part
Description
A4 Right Main Jet 6000-8000 ft.
137d Outer Bowl O-ring (replacement)
137e Inner Bowl O-ring (replacement)
Qty
1
2
2
Disassembly
1. Turn off the engine.
2. Close the fuel valve, if equipped.
If no fuel valve is equipped, then clamp
the fuel hose closed right before the filter.
Be careful to avoid damaging the fuel hose.
4. Remove the Air Cleaner Front Cover (101),
pulling it up then out. See Figure B.
Air Cleaner
Front Cover (101)
3. Remove the Air Cleaner Top Knob (142a) and the
two Air Cleaner Front Knobs (102). See Figure A.
Air Cleaner
Top Knob (142a)
Operation
Air Cleaner
Front Knob
(102)
Figure B: Remove Front Cover
Maintenance
Figure A: Remove Knobs
Page 8
For technical questions, please call 1-888-866-5797.
ITEM 61614
Air Cleaner
Top Cover
(142b)
9. Remove the four Shroud Nuts (99) and the two
Flange Shoulder Bolts (112) from the Shroud (100).
The Flange Shoulder Bolt on the right holds the
Lifting Bracket (111) in place. See Figure E.
Flange
Shoulder
Bolt (112)
Flange Shoulder
Bolt (112)
behind Lifting Bracket
Air Cleaner
Spacer (142c)
Safety
5. Remove the Air Cleaner Top Cover (142b) and
internal Air Cleaner components
(Spacer, Foam and Paper Filters (142c-142e)).
See Figure C.
Foam Air
Filter (142d)
Setup
Paper Air
Filter (142e)
Shroud
Nuts (99)
Figure C: Remove Air Cleaner
Top Cover and components
6. Remove the two Intake Cover Bolts (143) and the
two Air Cleaner Base Bolts (146). See Figure D.
Note: Air Cleaner Front Cover is still shown,
although it should have been removed in step 4.
Shroud (100)
Figure E: Remove Shroud
10. Remove the Shroud.
Intake Cover
Bolts (143)
Operation
7. Detach the top of the Fuel Filter Clip (147)
from the Air Cleaner Base (142g).
Air Cleaner
Base Bolts
(146)
Fuel Filter
Clip (147)
Maintenance
Air Cleaner
Base (142g)
Figure D: Remove Bolts and Clip
from Air Cleaner Base
8. Remove the Air Cleaner Base.
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 9
11. WARNING! TO PREVENT SERIOUS INJURY FROM FIRE, BEFORE CONTINUING:
a. Make sure that the work area is well‑ventilated and that there are no ignition sources.
b. Have multiple class ABC fire extinguishers available.
c. Double-check that fuel hose leading from fuel tank to Fuel Filter is clamped or fuel valve is closed.
Safety
d. Use a safe, proper means to clean up all fuel spills immediately.
12. Squeeze the Spring Clamp (140) and slide it back.
Detach the Fuel Hose (141) from the port at
the top of the Carburetor. See Figure F.
Spring
Clamp (140)
15. Disconnect the Throttle Rod Spring
from the Throttle Rod Clip.
16. Squeeze the Spring Wire Clamp (32) and slide
it back. Detach the Breather Hose (33) from
the right side of the Carburetor. See Figure I.
Spring Wire
Clamp (32)
Fuel
Hose (141)
fuel
port
Breather
Hose (33)
Setup
Figure F: Detach Fuel Hose
13. Locate the Throttle Rod (174) connection on
the left side of the carburetor. See Figure G.
Throttle
Rod (174)
Operation
Throttle Rod
Spring (175)
Figure I: Detach Breather Hose
17. Locate the Choke Rod (177) connection on the
right side of the carburetor. See Figure J.
Choke Rod
Clip (176)
Throttle Rod
Clip (139)
Choke
Rod (177)
Figure G: Disconnect Throttle Rod
Maintenance
14. A: Swing the black Throttle Rod Clip (139) down
to release the Throttle Rod. See Figure H.
B: Pull the Throttle Rod out of the Clip.
Figure J: Disconnect Choke Rod
18. Swing the black Choke Rod Clip (176) aside to
release the Choke Rod. Disconnect the Choke Rod.
B
A
Figure H: Throttle Rod Clip
Page 10
For technical questions, please call 1-888-866-5797.
ITEM 61614
20. Underneath where the Fuel Pump Bracket was,
the Solenoid Valve (138) is connected.
Note the location of the green wire and green dot on
the connector. Unplug the connector. See Figure L.
Carburetor
Intake Elbow
(131)
Fuel Pump
Bracket (40)
Bolt
(132)
Bolt (133)
Bolt
(132)
Safety
19. At the front of the Carburetor,
remove the Bolt (38) holding the
Fuel Pump Bracket (40) in place. See Figure K.
Bolt (38)
Figure K: Remove Fuel Pump Bracket
Solenoid wire
connector
Figure L: Disconnect Solenoid Valve wire connector
Setup
Note location
of dots here.
21. Remove Bolt (133) and two Bolts (132) from the
Carburetor Intake Elbow (131). See Figure L.
Maintenance
Operation
22. Remove the Carburetor assembly from the engine.
Keep it upright, it may contain fuel.
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 11
23. Hold the fuel drain port over a bowl, and open the
Carburetor Drain Plug (137a) to allow fuel to drain
out of that port. Once the carburetor is empty,
close the Carburetor Drain Plug. See Figure M.
26. Use a carburetor screwdriver (sold separately)
to remove the Left Main Jet and replace it with
the proper replacement Left Main Jet (A1 or A3)
for the altitude. See Figure O.
Safety
27. Use a carburetor screwdriver to remove the
Right Main Jet and replace it with the replacement
Right Main Jet (A2 or A4) for the same altitude
as the Left Main Jet. See Figure O.
fuel
drain
port
Carburetor
Drain Plug
(137a)
Right
Main Jet
(A2/A4)
Left
Main Jet
(A1/A3)
Figure M: Carburetor Drain
24. Turn the Carburetor assembly over.
Setup
25. Remove the four Carburetor Bowl Bolts (137b) and
remove the Carburetor Bowl (137c). See Figure N.
Carburetor
Bowl Bolt
(137b)
Carburetor
Bowl Bolt
(137b)
Operation
Note: Since carburetor is upside-down,
left and right sides are reversed.
Figure O: Main Jets
Carburetor
Bowl
(137c)
Carburetor
Bowl Bolt
(137b)
Carburetor
Bowl Bolt
(137b)
Figure N: Carburetor Bowl Bolts
Maintenance
Page 12
For technical questions, please call 1-888-866-5797.
ITEM 61614
Reassembly
1. Replace the Outer and Inner Bowl O-rings
(137d, 137e) with the replacements
from the altitude kit. Do not reuse existing O-rings.
5. Attach the Choke Rod on the right side of the
Carburetor, and secure it with its Clip. [#17,18]
6. Attach the Breather Hose to the Carburetor,
and secure it with its Clamp. [#16]
7. Attach the Throttle Rod Spring to the Throttle Rod
Clip on the left side of the Carburetor. [#15]
Inner Bowl
O-ring
8. Insert the Throttle Rod on the left side of the
Carburetor, and secure it with its Clip. [#14]
Safety
Note: Reassembly step references shown in brackets.
9. Attach the Fuel Hose to the port at the top of the
Carburetor and attach it using its Clamp. [#12]
Outer Bowl
O-ring
10. Install Shroud using four Shroud Bolts and two
Flange Shoulder Bolts. [#9,10] Include the Lifting
Bracket in place on the right Flange Shoulder Bolt.
Carburetor
Bowl
Figure P: Replace Bowl O-rings
2. Assemble the Carburetor Bowl using four
Carburetor Bowl Bolts. [#25] Assemble Carburetor
Intake Elbow to Intake using Bolts. [#21]
3. Attach Solenoid Valve connector, line up green
wire with the green dot on the connector. [#20]
13. Replace the Air Cleaner Front Cover. [#4]
14. Use the Air Cleaner Top Knob and Air Cleaner
Front Knobs to secure the Covers in place. [#3]
15. Once all connections are secure,
open fuel valve/unclamp fuel hose.
16. Wipe up any spilled fuel and allow excess
to evaporate before starting engine.
To prevent FIRE, do not start the engine
while the smell of fuel hangs in the air.
Maintenance
Operation
4. Attach Fuel Pump Bracket to front of intake
using Bolt. Gently lift the Bracket after
assembly to ensure proper alignment. [#19]
12. Place the Paper Air Filter, Foam Air Filter,
Air Cleaner Spacer, and Air Cleaner Top Cover
into place on the Air Cleaner Base. [#5]
Setup
11. Install Air Cleaner Base using two Air Cleaner Base
Bolts. Connect Fuel Filter Clip under left side of
Air Cleaner Base. Install the Intake Cover and
Intake Screen using the Intake Cover Bolts. [#6-8]
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 13
Battery Setup Instructions
Safety
1. Place a fully charged, lead-acid 12 volt,
36 Ah battery (not included) in a stable,
flat location near the engine.
solenoid on
Starter (164)
2. Only use cables sized to match
their length according to .
red wire
to positive
battery cable
(lower gauge numbers
mean thicker cables)
Cable Gauge
Maximum
Cable Length
6
4
2
5′
7′
12′
connect negative
battery cable to
a mounting bolt
Table A: Minimum Cable Diameters
Setup
3. Attach the positive cable from the positive battery
terminal to the outer terminal on the Starter’s (164)
solenoid, see Figure Q and Figure R. Connect cable
securely to prevent disconnection and short circuits.
4. Attach the negative cable to the
negative battery terminal.
Figure Q: Battery Cable Connections
Connect Cable
from Positive
Battery
Terminal to
this Starter
Terminal
5. Connect the negative cable securely to one
of the engine mounting bolts, as shown
in Figure Q. Connect cable securely to
prevent disconnection and short circuits.
Operation
6. Coat the terminals and cable ends with
a corrosion-preventive coating.
Figure R: Connect Positive to this Terminal
Maintenance
Page 14
For technical questions, please call 1-888-866-5797.
ITEM 61614
Fuel Tank Setup Instructions
3. Connect a fuel hose from the fuel tank to the
exposed port of the Fuel Filter, and secure it
in place with a hose clamp. See Figure S.
fuel hose
connection
Setup
2. WARNING! Fuel tank (not included) must be
designed specifically for containing gasoline and
must be mounted to a stable mounting frame.
Some areas may have specific
gasoline vapor containment requirements;
comply with local, state, and federal laws.
Safety
1. If possible, incorporate a fuel shutoff valve
on the fuel hose (neither included).
Maintenance
Operation
Figure S: Fuel Hose Connector
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 15
Operation
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual
including all text under subheadings therein before set up or use of this product.
Safety
Pre-Start Checks
Inspect engine and equipment looking for damaged, loose, and missing parts before set up and starting.
If any problems are found, do not use equipment until fixed properly.
Checking and Filling Engine Oil
Setup
NOTICE: Your Warranty is VOID if the engine’s
crankcase is not properly filled with oil before
each use. Before each use, check the oil level.
Do not run the engine with low or no engine oil.
Running the engine with no or low engine oil
WILL permanently damage the engine.
Oil Fill Plug
1. Make sure the engine is stopped and is level.
2. Close the Fuel Valve, if equipped.
3. Clean the top of the Dipstick and the
area around it. Pull the Dipstick out,
and wipe it off with a clean, lint free rag.
Dipstick
4. Reinsert the Dipstick and remove it to
check the oil level. The oil level should be
up to the upper mark on the dipstick.
Operation
5. If the oil level is at or below the low mark,
remove the Oil Fill Plug and add the appropriate
type of oil until the oil level is at the proper level.
SAE 10W‑30 oil is recommended for general use.
(Table B: SAE Viscosity Grade on page 21 in the
Maintenance section shows other viscosities to use
in different average temperatures.)
Replace the Oil Fill Plug.
6. Insert the Dipstick back into the housing.
Figure T: Oil Fill and Dipstick
NOTICE: Do not run the engine with too little oil.
The engine will be permanently damaged.
Maintenance
Page 16
For technical questions, please call 1-888-866-5797.
ITEM 61614
Checking and Filling Fuel
1. Clean the Fuel Cap and the area around it.
2. Unscrew and remove the Fuel Cap.
3. Remove the Strainer and remove any dirt
and debris. Then replace the Strainer.
4. If needed, fill the Fuel Tank to about 1 inch under
the fill neck of the Fuel Tank with 87 octane or
higher unleaded gasoline that has been treated
with a fuel stabilizer additive. Follow fuel stabilizer
manufacturer’s recommendations for use.
5. Then replace the Fuel Cap.
6. Wipe up any spilled fuel and allow excess
to evaporate before starting engine.
To prevent FIRE, do not start the engine
while the smell of fuel hangs in the air.
Maintenance
Operation
Setup
Note: Do not use gasoline containing more than
10% ethanol (E10). Do not use E85 ethanol. Add fuel
stabilizer to the gasoline or the Warranty is VOID.
Note: Do not use gasoline that has been stored in a
metal fuel container or a dirty fuel container. It can
cause particles to enter the carburetor, affecting
engine performance and/or causing damage.
Safety
WARNING! TO PREVENT SERIOUS
INJURY FROM FIRE:
Fill the fuel tank in a well-ventilated area
away from ignition sources. If the engine
is hot from use, shut the engine off and
wait for it to cool before adding fuel. Do not smoke.
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 17
Starting the Engine
Safety
Before starting the engine:
a. Follow the Set Up Instructions in this manual to prepare the engine.
b. Follow the Set Up Instructions in the equipment manual to prepare the equipment.
c. Inspect the equipment and engine.
d. Fill the engine with the proper amount and type of both unleaded gasoline and oil.
e. Read the Equipment Operation section in the equipment manual.
1. To start a cold engine, pull the Choke Knob out
to the START position.
To restart a warm engine, push the Choke in
to the RUN position.
1
Setup
2. Open the Fuel Valve, if equipped.
Operation
3. Slide the Throttle or Speed Control Lever to 1/3
away from the SLOW position (the “turtle”).
Note: Some tools have a Speed Control Lever located
elsewhere on the tool which functions the same as
the Throttle. Use the Speed Control Lever in place
of the Throttle when the tool is so equipped.
3
Maintenance
ON
4. Insert the Key and turn it to START
until the engine starts,
no more than a few seconds.
Release the Key when the engine starts.
Page 18
OFF
START
4
For technical questions, please call 1-888-866-5797.
ITEM 61614
5. Allow the Engine to run for several seconds.
Then, if the Choke Knob is in
the pulled‑out START position,
push the Choke Knob in very slowly
to its RUN position.
Safety
5
Note: Moving the Choke Knob too
fast could stall the engine.
IMPORTANT: Allow the engine to run at no load for five minutes
after each start‑up so that the engine can stabilize.
6. Adjust the Throttle as needed.
Setup
Break-in Period:
a. Breaking-in the engine will help to ensure proper equipment and engine operation.
b. The operational break-in period will last about 3 hours of use. During this period:
• Do not apply a heavy load to the equipment.
• Do not operate the engine at its maximum speed.
c. The maintenance break-in period will last about 20 hours of use.
• Change the engine oil after this period.
Under normal operating conditions subsequent maintenance follows
the schedule explained in the Maintenance section.
1. To stop the engine in an emergency,
turn the Key to OFF.
Operation
Stopping the Engine
ON
OFF
START
2. Under normal conditions, use the following procedure:
Maintenance
a. Slide the Throttle or Speed Control
Lever to SLOW (the “turtle”).
b. Turn the Key to OFF.
c. Close the Fuel Valve, if equipped.
NOTICE
Drain fuel at end of season
or warranty is void.
See Storage on page 23 for
complete storage instructions.
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 19
Maintenance
WARNING
Safety
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL STARTING:
Turn the Power Switch of the equipment to its “OFF” position, wait for the engine to cool, and disconnect
the spark plug caps before performing any inspection, maintenance, or cleaning procedures.
TO PREVENT SERIOUS INJURY FROM EQUIPMENT FAILURE:
Do not use damaged equipment. If abnormal noise, vibration, or
excess smoking occurs, have the problem corrected before further use.
Follow all service instructions in this manual. The engine may fail critically if not serviced properly.
Many maintenance procedures, including any not detailed in this manual, will need to be performed
by a qualified technician for safety. If you have any doubts about your ability to safely service the
equipment or engine, have a qualified technician service the equipment instead.
Cleaning, Maintenance, and Lubrication Schedule
Setup
Note: This maintenance schedule is intended solely as a general guide. If performance decreases or if
equipment operates unusually, check systems immediately. The maintenance needs of each piece of equipment
will differ depending on factors such as duty cycle, temperature, air quality, fuel quality, and other factors.
Note: The following procedures are in addition to the regular checks and maintenance
explained as part of the regular operation of the engine and equipment.
Before
Each Use
Procedure
Monthly or
Every 3 mo. or Every 6 mo. or
every 20
50 hr. of use 100 hr. of use
hr. of use
Yearly or
every 300
hr. of use
Every
2 Years
Brush off outside of engine
Check engine oil level
Check air cleaner
Check sediment cup
Operation
Change engine oil and oil filter
Clean/replace air filter
1. Check and clean spark plugs
*
2. Replace fuel filter.
1. Check/adjust idle speed
2. Check/adjust valve clearance
3. Clean fuel tank, strainer
and carburetor
**
4. Clean carbon build-up from
combustion chambers
**
**
Replace fuel line if necessary
*Service more frequently when used in dusty areas.
**These items should be serviced by a qualified technician.
Maintenance
Page 20
For technical questions, please call 1-888-866-5797.
ITEM 61614
Checking and Filling Fuel
1. Clean the Fuel Cap and the area around it.
2. Unscrew and remove the Fuel Cap.
3. Remove the Strainer and remove any dirt
and debris. Then replace the Strainer.
Note: Do not use gasoline containing more than
10% ethanol (E10). Do not use E85 ethanol. Add fuel
stabilizer to the gasoline or the Warranty is VOID.
Note: Do not use gasoline that has been stored in a
metal fuel container or a dirty fuel container. It can
cause particles to enter the carburetor, affecting
engine performance and/or causing damage.
4. If needed, fill the Fuel Tank to about 1 inch under
the fill neck of the Fuel Tank with 87 octane or
higher unleaded gasoline that has been treated
with a fuel stabilizer additive. Follow fuel stabilizer
manufacturer’s recommendations for use.
5. Then replace the Fuel Cap.
6. Wipe up any spilled fuel and allow excess
to evaporate before starting engine.
To prevent FIRE, do not start the engine
while the smell of fuel hangs in the air.
Setup
Engine Oil Change
CAUTION! Oil is very hot during operation and can
cause burns. Wait for engine to cool before changing oil.
Safety
WARNING! TO PREVENT SERIOUS
INJURY FROM FIRE:
Fill the fuel tank in a well-ventilated area
away from ignition sources. If the engine
is hot from use, shut the engine off and
wait for it to cool before adding fuel. Do not smoke.
Oil Fill Plug
1. Make sure the engine is stopped and is level.
Dipstick
3. Place a drain pan (not included) underneath
the crankcase’s Oil Drain Plug.
5. Replace the Oil Drain Plug and tighten it.
6. Move the drain pan underneath the Oil Filter.
7. Unthread and remove the Oil Filter. Allow the oil to
drain out of the filter completely before disposal.
Oil Drain Plug
Figure U: Oil Drain and Oil Filter Location
30
8. Install a new Oil Filter of the same size and type.
9. Clean the top of the Dipstick and the
area around it. Pull the Dipstick out,
and wipe it off with a clean, lint free rag.
10. Remove the Oil Fill Plug and add the appropriate
type of oil until the oil level is at the proper level.
SAE 10W‑30 oil is recommended for general use.
The SAE Viscosity Grade chart shows other
viscosities to use in different average temperatures.
Replace the Oil Fill Plug.
10W-30
5W-30
-20
0
20
40
60
80
Average outdoor temperature
100°F
Table B: SAE Viscosity Grade
11. Insert the Dipstick back into the housing.
NOTICE: Do not run the engine with too little oil.
The engine will be permanently damaged.
ITEM 61614
Operation
Oil Filter
4. Remove the Oil Drain Plug and, if possible,
tilt the crankcase slightly to help drain the oil out.
Recycle used oil.
For technical questions, please call 1-888-866-5797.
Page 21
Maintenance
2. Close the fuel valve, if equipped.
Air Filter Maintenance
1. Remove the Air Cleaner Top Cover and
the air filter elements and check for
dirt. Clean as described below.
Safety
2. Clean Paper Air Filter:
To prevent injury from dust and debris, wear
ANSI‑approved safety goggles, NIOSH‑approved
dust mask/respirator, and heavy-duty work gloves.
In a well‑ventilated area away from bystanders,
use pressurized air to blow dust out of the Filter.
3. Clean Foam Air Filter:
Wash the Filter in warm water and mild
detergent several times. Rinse. Squeeze out
excess water and allow it to dry completely.
Soak the Filter in lightweight oil briefly,
then squeeze out the excess oil.
4. Install the cleaned filter. Secure the Air
Cleaner Top Cover before use.
Spark Plug Maintenance
NOTICE: Using an incorrect spark plug
may damage the engine.
Spark
Plug
Cap
4. When installing a new spark plug(s),
adjust the plug’s gap to the specification on the
Specifications chart. Do not pry against the
electrode, the spark plug can be damaged.
Setup
5. Install the new spark plug(s) or
the cleaned spark plug(s) into the engine.
1. Disconnect spark plug caps from ends of plugs.
Clean out debris from around spark plugs.
2. Using a spark plug wrench, remove the spark plugs.
3. Inspect the spark plugs:
If the electrode(s) is oily, clean it using a clean,
dry rag. If the electrode(s) has deposits on it, polish
it using emery paper. If the white insulator is cracked
or chipped, the spark plug needs to be replaced.
Operation
Recommended Spark Plugs
TORCH®
NGK®
F5RTC
BPR5ES
• Gasket-style:
Finger-tighten until the gasket
contacts the cylinder head,
then tighten about 1/2-2/3 turn more.
• Non-gasket-style:
Finger-tighten until the plug
contacts the cylinder head,
then tighten about 1/16 turn more.
NOTICE: Tighten the spark plugs properly.
If loose, the spark plugs will cause the
engine to overheat.
If overtightened, the threads in the
engine block will be damaged.
6. Apply dielectric spark plug boot protector
(not included) to the end of the spark plugs
and reattach the wires securely.
Maintenance
Page 22
For technical questions, please call 1-888-866-5797.
ITEM 61614
When the equipment is to remain idle for longer than
20 days, prepare the Engine for storage as follows:
c. Replace spark plug, but leave
spark plug cap disconnected.
1. CLEANING:
Wait for Engine to cool, then clean Engine with
dry cloth. NOTICE: Do not clean using water.
The water will gradually enter the Engine
and cause rust damage. Apply a thin coat
of rust preventive oil to all metal parts.
d. Pull Starter Handle to distribute oil in cylinder.
Stop after one or two revolutions when you
feel the piston start the compression stroke
(when you start to feel resistance).
To protect the fuel tank during storage, fill the
tank with gasoline that has been treated with
a fuel stabilizer additive. Follow fuel stabilizer
manufacturer’s recommendations for use. Refer
to Checking and Filling Fuel on page 17.
WARNING! TO PREVENT SERIOUS
INJURY FROM FIRE:
Fill tank in a well-ventilated area away from
ignition sources. If the engine is hot from
use, shut the engine off and wait for it to
cool before adding fuel. Do not smoke.
3. LUBRICATION:
a. Change engine oil.
NOTICE: During extended storage periods the
Engine must be started every 3 months and allowed
to run for 15 – 20 minutes or the Warranty is VOID.
6. AFTER STORAGE:
Before starting the Engine during or after
storage, keep in mind that untreated gasoline
will deteriorate quickly. Drain the fuel
tank and change to fresh fuel if untreated
gasoline has been sitting for a month, if
treated gasoline has been sitting beyond the
fuel stabilizer’s recommended time period,
or if the Engine does not start.
Maintenance
Operation
b. Clean out area around spark plug.
Remove spark plug and pour one tablespoon of
engine oil into cylinder through spark plug hole.
5. STORAGE AREA:
Cover and store in a dry, level, well-ventilated
area out of reach of children. Storage area should
also be away from ignition sources, such as
water heaters, clothes dryers, and furnaces.
Setup
2. FUEL:
4. BATTERY:
Disconnect battery cables (if equipped).
Recharge batteries monthly while in storage.
Safety
Storage
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 23
Troubleshooting
Problem
Possible Causes
Engine will not start FUEL RELATED:
Probable Solutions
FUEL RELATED:
Safety
Setup
Operation
Maintenance
1. No fuel in tank or fuel valve closed.
1. Fill fuel tank with fresh 87+ octane
stabilizer-treated unleaded gasoline and
open fuel valve.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
2. Choke not in START position, cold engine.
2. Move Choke to START position.
3. Gasoline with more than 10% ethanol used.
(E15, E20, E85, etc.)
3. Clean out ethanol rich gasoline from fuel
system. Replace components damaged by
ethanol. Use fresh 87+ octane stabilizertreated unleaded gasoline only.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
4. Low quality or deteriorated, old gasoline.
4. Use fresh 87+ octane stabilizer-treated
unleaded gasoline.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
5. Carburetor not primed.
5. Pull on Starter Handle to prime.
6. Dirty fuel passageways.
6. Clean out passageways using
fuel additive. Heavy deposits
may require further cleaning.
7. Carburetor needle stuck.
Fuel can be smelled in the air.
7. Gently tap side of carburetor float
chamber with screwdriver handle.
8. Too much fuel in chamber. This can be
caused by the carburetor needle sticking.
8. Turn Choke to RUN position.
Remove spark plugs and briefly
turn the key to start to air out the
chambers. Reinstall spark plugs and
set Choke to START position.
9. Clogged Fuel Filter.
9. Replace Fuel Filter.
IGNITION (SPARK) RELATED:
IGNITION (SPARK) RELATED:
1. Spark plug caps not connected securely.
1. Connect spark plug caps properly.
2. Spark plug electrodes wet or dirty.
2. Clean spark plugs.
3. Incorrect spark plug gaps.
3. Correct spark plug gaps.
4. Spark plug caps broken.
4. Replace spark plug caps.
5. Circuit breaker tripped.
5. Reset circuit breaker. Check wiring and
starter motor if breaker continues to trip.
6. Incorrect spark timing or
faulty ignition system.
6. Have qualified technician diagnose/
repair ignition system.
COMPRESSION RELATED:
COMPRESSION RELATED:
1. Cylinder not lubricated.
Problem after long storage periods.
1. Pour tablespoon of oil into each
spark plug hole. Crank engine a
few times and try to start again.
2. Loose or broken spark plugs.
(Hissing noise will occur
when trying to start.)
2. Tighten spark plugs.
If that does not work, replace spark plugs.
If problem persists, may have
head gasket problem, see #3.
3. Loose cylinder head or damaged
head gasket. (Hissing noise will
occur when trying to start.)
3. Tighten head.
If that does not remedy problem,
replace head gasket.
4. Engine valves or tappets
mis‑adjusted or stuck.
4. Have qualified technician adjust/
repair valves and tappets.
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.
Page 24
For technical questions, please call 1-888-866-5797.
ITEM 61614
1. Spark plug caps loose.
1. Check wire connections.
2. Incorrect spark plug gaps or
damaged spark plugs.
2. Re-gap or replace spark plugs.
3. Defective spark plug caps.
3. Replace spark plug caps.
4. Old or low quality gasoline.
4. Use only fresh 87+ octane stabilizer-treated
unleaded gasoline.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
5. Incorrect compression.
5. Diagnose and repair compression.
(Use Engine will not start:
COMPRESSION RELATED section.)
1. Fuel tank empty or full of impure or
low quality gasoline.
1. Fill fuel tank with fresh 87+ octane
stabilizer-treated unleaded gasoline.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
2. Low oil shutdown.
2. Fill engine oil to proper level.
Check engine oil before EVERY use.
3. Defective fuel tank cap creating vacuum,
preventing proper fuel flow.
3. Test/replace fuel tank cap.
4. Faulty magneto.
4. Have qualified technician service magneto.
5. Disconnected or improperly
connected spark plug caps.
5. Secure spark plug caps.
6. Starter motor has overheated.
6. Allow starter motor to cool, then press
circuit breaker button on control panel.
Do not use starter for more than
a few seconds at a time.
Engine stops when
under heavy load
1. Dirty air filter.
1. Clean or replace element.
2. Engine running cold.
2. Allow engine to warm up prior
to operating equipment.
Engine knocks
1. Old or low quality gasoline.
1. Fill fuel tank with fresh 87+ octane
stabilizer-treated unleaded gasoline.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
2. Engine overloaded.
2. Do not exceed equipment’s load rating.
3. Incorrect spark timing, deposit buildup,
worn engine, or other mechanical problems.
3. Have qualified technician
diagnose and service engine.
1. Impure or low quality gasoline.
1. Fill fuel tank with fresh 87+ octane
stabilizer-treated unleaded gasoline.
Do not use gasoline with more than
10% ethanol (E15, E20, E85, etc.).
2. Engine too cold.
2. Use cold weather fuel and
oil additives to prevent backfiring.
3. Intake valve stuck or overheated engine.
3. Have qualified technician
diagnose and service engine.
4. Incorrect timing.
4. Check engine timing.
Engine stops
suddenly
Engine backfires
ITEM 61614
For technical questions, please call 1-888-866-5797.
Maintenance
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.
Safety
Probable Solutions
Setup
Engine misfires
Possible Causes
Operation
Problem
Page 25
Warranties
Safety
Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards,
and warrants to the original purchaser that this product is free from defects in materials and workmanship for the
period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper
installation, normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries
to persons or property, or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
Setup
To take advantage of this warranty, the product or part must be returned to us with transportation charges prepaid.
Proof of purchase date and an explanation of the complaint must accompany the merchandise.
If our inspection verifies the defect, we will either repair or replace the product at our election or
we may elect to refund the purchase price if we cannot readily and quickly provide you with a replacement.
We will return repaired products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
Emissions Control System Warranty
Operation
California and United States Emissions
Control Defects Warranty Statement
Harbor Freight Tools Emissions Control
Defects Warranty Coverage
The California Air Resources Board (herein CARB), the United
States Environmental Protection Agency (herein EPA), and
Harbor Freight Tools (herein HFT) are pleased to explain the
emissions control system warranty on your 2014-2015 Small OffRoad Engine (herein engine). In California, the engine must be
designed, built and equipped to meet the State’s stringent antismog standards. Elsewhere Within the United States, new offroad, spark-ignition engines certified for model year 2014-2015,
must meet similar standards set forth by the EPA. HFT must
warrant the emissions control system on your engine for the
periods of time described below, provided there has been no
abuse, neglect or improper maintenance of your engine.
Engines are warranted for a period of two (2) years relative
to emissions control parts defects, subject to the provisions
set forth below. If any emissions related part on your engine
is defective, the part will be repaired or replaced by HFT.
Your emissions control system may include parts such as the
carburetor or fuel-injection system, and the ignition system.
Also included may be hoses, belts, connectors
and other emissions‑related assemblies.
Maintenance
Where a warrantable condition exists, HFT will repair your
engine at no cost to you including diagnosis, parts and labor.
Manufacturer’s Warranty Coverage
The 2014-2015 engines are warranted for two (2) years.
If any emissions-related part on your engine is defective,
the part will be repaired or replaced by HFT.
Page 26
Owner’s Warranty Responsibilities
• As the engine owner, you are responsible for the performance
of the required maintenance listed in your Owner’s Manual.
HFT recommends that you retain all receipts covering
maintenance on your engine, but HFT cannot deny warranty
solely for the lack of receipts or for your failure to
ensure the performance of all scheduled maintenance.
• As the engine owner, you should, however, be aware
that HFT may deny you warranty coverage if your
engine or a part has failed due to abuse, neglect,
improper maintenance, or unapproved modifications.
• You are responsible for shipping your engine to a HFT
warranty station as soon as a problem exists. Contact the
HFT Customer Service department at the number below to
make shipping arrangements. The warranty repairs should be
completed in a reasonable amount of time, not to exceed 30 days.
If you have any questions regarding your warranty rights
and responsibilities, you should contact the Harbor Freight Tools
Customer Service Department at 1-888-866-5797.
For technical questions, please call 1-888-866-5797.
ITEM 61614
HFT warrants to a first retail purchaser and each
subsequent purchaser that the engine is free from
defects in materials and workmanship that cause
the failure of warranted parts for a period of two (2) years
after the date of delivery to the first retail purchaser.
2. No Charge Repair or Replacement
Repair or replacement of any warranted part will be
performed at no charge to the owner if the work is
performed through a warranty station authorized by HFT.
For emissions warranty service, contact the HFT
Customer Service Department at 1-888-866-5797.
Component parts which are not scheduled for replacement
as required maintenance or are scheduled only for regular
inspection to the effect of “repair or replace as necessary”
are warranted for the warranty period. Any warranted part
which is scheduled for replacement as required maintenance
is warranted for the period of time up to the first scheduled
replacement point for that part. Any replacement part, provided
it is equivalent in durability and performance, may be used
in performance of maintenance or repairs. The owner is
responsible for commissioning a qualified technician/mechanic
to perform all required maintenance, as outlined in the
Inspection, Cleaning, and Maintenance section in this manual.
6. Warranted Parts
1)
3. Consequential Damages Coverage
Coverage under this warranty shall also extend to the failure
of any engine components caused by the failure of any
warranted part while it is still covered under this warranty.
2)
4. Coverage Exclusions
3)
4)
5)
Operation
Warranty claims shall be filed in accordance with the provisions
of the HFT warranty policy explained in the box at the top of the
previous page. HFT shall not be liable for any loss of use of
the engine, for any alternative usage, for any damage to goods,
loss of time, or inconvenience. Warranty coverage shall also be
excluded for any part which fails, malfunctions, or is damaged
due to failure to follow the maintenance and operating instructions
set forth in the Owner’s Manual including, but not limited to:
a) Use of parts which are not authorized by HFT
b) Improper installation, adjustment or repair of
the engine or of any warranted part unless
performed by an authorized warranty center
c) Failure to follow recommendations on fuel use
contained in the Owner’s Manual
d) Improper or inadequate maintenance of any warranted parts
e) Repairs performed outside of
the authorized warranty service dealers
f) Alterations by changing, adding to or
removing parts from the engine.
Fuel Metering System
i) Carburetor and its internal parts.
ii) Fuel pump (if so equipped).
iii) Cold start enrichment system.
Air Induction System
i) Intake pipe/manifold.
ii) Air cleaner.
Ignition System
i) Spark plugs.
ii) Magneto ignition system.
Catalyst System (if so equipped)
i) Exhaust pipe stud.
ii) Muffler.
iii) Catalytic converter (if so equipped).
Miscellaneous Items Used in Above Systems
i) Vacuum, temperature and time
sensitive valves and switches.
ii) Hoses, belts, connectors, and assemblies.
Safety
1. Length of Coverage
5. Service and Maintenance
Setup
Harbor Freight Tools Emissions Control
Defects Warranty Provisions
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM
IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR DISTRIBUTOR
MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS
QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED TO REPLACE
ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY
STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND
LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY
ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS
THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 27
Maintenance
PLEASE READ THE FOLLOWING CAREFULLY
Parts Lists and Diagrams
Parts List
Safety
Part
Setup
Operation
Maintenance
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
Description
Bolt, Cylinder Head Cover
Cover, Left Cylinder Head
Gasket, Cylinder Head Cover
Spark Plug
Bolt, Cylinder Head
Head, Left Cylinder
Head, Right Cylinder
Pin
Gasket, Cylinder Head
Metal Head Gasket
Stud
Stud
Cover, Right Cylinder Head
Oil Fill Plug
Oil Fill Plug Seal
Crankcase
Cotter Pin
Washer
Governor Arm
Oil Seal
Drain Plug
Washer
Oil Seal
Breather Separator
Breather Plate
Breather Gasket
Breather Gasket
Breather Cover
Clamp
Bolt
Bolt
Spring Wire Clamp
Breather Hose
Gasket, Inlet
Intake
Nut
Fuel Pump
Bolt
Fuel Pump Sleeve
Fuel Pump Bracket
Fuel Filter
Spring Clamp
Vacuum Hose
Vacuum Hose
Spring Clamp
Fuel Hose
Fuel/Oil Separator
Fuel Hose
Clamp
PCV Valve
Sensor, Engine Oil
Bolt
Bolt
Bolt
Crankcase Cover
Pin
Crankcase Gasket
Seal, Oil
Hose, Suction Oil
O-Ring
Bolt
Bolt
Pin
Oil Pump Asm.
Cover, Oil Pump
Spring, Pressure Relief Valve
Page 28
Qty
2
1
2
2
8
1
1
4
4
2
4
4
1
1
1
1
2
3
1
1
2
2
1
1
1
1
1
1
1
2
2
2
1
2
1
4
1
3
2
1
1
5
1
1
2
1
1
1
1
1
1
2
7
2
1
2
1
1
1
1
2
2
2
1
1
1
Part
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
Description
Ball, Steel
Strainer, Oil
Governor Gear Asm.
Dipstick, Oil
Gasket, Oil Pump
Crankshaft
Washer, Thrust
Rod, Connecting
Piston
Pin, Piston
Clip, Piston Pin
Primary Ring
Secondary Ring
Ring Set, Oil
Nut, Valve Lock
Bolt,Valve Adjusting
Rocker, Valve
Shaft, Valve Rocker
Lifter, Valve
Tappet, Valve
Seat, Valve Spring
Check Ring
Clamp, Valve Lock
Spring, Valve
Guide, Seal
Retainer, Valve Spring
Valve, Exhaust
Valve, Intake
Camshaft
Washer, Camshaft
Shield, Shroud
Bolt
Shroud Nut
Shroud
Air Cleaner Front Cover
Air Cleaner Front Knob
Shroud 2, Cylinder Body
Diode
Shroud, Cylinder Body
Shield, Lower
Bolt
Plug, End
Shield, Crankcase Side
Bolt, Flange Shoulder
Lifting Bracket
Flange Shoulder Bolt
Right Lower Cover
Right Shield
Gasket, Oil Filter Cover
Oil Filter Block
Ring, Seal
Hose, Oil Filter Installation
Oil Filter
Washer, Flat
Cooling Pipe Adapter
Clamp
Cooling Pipe
Cooling Pipe
Radiator
Bolt
Voltage Regulator Insulator
Regulator, Voltage
Gasket, Carburetor
Gasket, Carburetor Insulator
Carburetor Intake Elbow
Bolt
Qty
1
1
1
1
1
1
1
2
2
2
4
2
2
2
4
4
4
4
4
4
4
4
8
4
4
4
2
2
1
1
1
3
4
1
1
2
1
1
1
1
13
1
1
1
2
2
1
1
1
1
1
1
1
2
2
4
1
1
1
2
1
1
3
1
1
2
Part
133
134
135
136
137
137a
137b
137c
137d
137e
138
139
140
141
142
142a
142b
142c
142d
142e
142f
142g
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
179
180
181
182
183
184
185
186
187
Description
Bolt
O-ring
Air Cleaner Connector
Bolt
Carburetor Asm.
Carburetor Drain Plug
Carburetor Bowl Bolt
Carburetor Bowl
Outer Bowl O-ring
Inner Bowl O-ring
Solenoid Valve
Throttle Rod Clip
Spring Clamp
Fuel Hose
Air Cleaner Asm.
Air Cleaner Top Knob
Air Cleaner Top Cover
Air Cleaner Spacer
Foam Air Filter
Paper Air Filter
Air Cleaner Gasket
Air Cleaner Base Asm.
Intake Cover Bolt
Intake Cover
Intake Screen
Air Cleaner Base Bolt
Fuel Filter Clip
Coil, Ignition
Coil, Ignition
Bolt
Stud
Stud
Coil, Charge
Bolt
Flywheel
Gasket
Bolt, Flywheel
Impeller
Tray, Impeller Setting
Bolt
Protector, Oil
Bolt
Pin
Starter
Bolt
Control, Throttle Asm.
Control, Throttle Asm.
Spring, Governor
Bolt
Spring, Governor
Nut
Bolt, Governor Support
Throttle Support
Throttle Rod
Throttle Rod Spring
Choke Rod Clip
Choke Rod
Throttle Cable
Motor Control Box
Control Box Support
Bolt
Muffler Asm.
Nut
Bolt
Gasket, Exhaust Outlet
Spark Collector
For technical questions, please call 1-888-866-5797.
Qty
1
1
1
4
1
1
4
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
1
1
1
2
2
2
1
6
1
1
1
1
1
3
1
1
2
1
2
1
1
1
2
1
2
1
1
1
1
1
1
1
1
1
2
1
4
2
2
1
ITEM 61614
Safety
55
57
71
65
69
62 61
60
61
70
59
184
184
78
79
80
186
75
77
184
185
184
185
74
107
103
107
105 107
109
107
122
124
1
187
183
186
77 75
114
111
113
107
4
3
5
77
78
79
80
82 82
83
107
107
104
107
107
112
127
76
81 81
2
73
Setup
53
56
56
63
63
62
76
111
106
110
77
125
108
122
115 123
120
121
122
5
12
5
83
5
12
84 84
85
6
85
89
8 8
90
72
89
88 89
87 87 88
89
128
12
90
12
91
86
9
8
91
14
15
5
13
3
5
1
4
5
11
11
11
7
5
9
11
86
83
84
81
82
92
85
93
95
52
51
21
25
27
81
82
83
94
30
91
92
88
89
87
33
90
32
136
136
136
134
137e
169
166
139
137d
135
137c
112
169
137a
168
45 47
138
44
42
160
160
159
160
162
39
40
43 42
46
48
42
42
45
137b
36
42
167
36
38
49
35
38
38
37
39
161
158
165
165
164
156
157
163
41
36
36
34
29 31
30
155
163
31
28
32
87
88
89
84
90
91
26
34
153
154
154
154
22
24
149
150
23
85
52
16
151
150 151
94
96
86
9
10
8
9
50
10
86
93
92 92
22
17
18
20
17
18
1918
21
148
152
Operation
53
58
54
66
126
126
116
117
119 118
120
121
122
152
Note: Some parts are listed and shown
for illustration purposes only, and are not
available individually as replacement parts.
142a
142b
142c
142d
142e
142
132
141
143
144
145
140
142f
146
97
98
98
99
99
179
142g
177
99
98
172
176
100
174 173
129
130
129
131
132
133
146
143
147
137
129
170
171
175
99
101
102
102
180
182
181
Maintenance
53
53
Assembly Diagram
54
53
53
53
68
67
64
Record Product’s Serial Number Here:
Note: If product has no serial number,
record month and year of purchase instead.
Page 29
For technical questions, please call 1-888-866-5797.
ITEM 61614
Mounting Hole Diagram
Note: Not to scale.
Safety
7.7" / 195.5mm
4" / 101.5mm
3.375" / 86mm
~4" / 102mm
4.625" / 117.5mm
Setup
2x 0.47" / 12mm
4x
0.47" /
12mm
Operation
Maintenance
Page 30
For technical questions, please call 1-888-866-5797.
ITEM 61614
Power Take-Off Diagram
2.84" / 72.2mm
0.72" /
18.3mm
1.3" / 34mm
3/8" - 24UNF
2.375" / 60.5mm
9x 0.43"
/ 11mm
Safety
Note: Not to scale.
0.2" / 5mm
1.1" / 28mm
1.4" / 36mm
0.86" /
21.8mm
0.25" / 6.3mm
Setup
PTO
Ø5.75" /
146mm
Operation
5.3" / 135mm
1" / 25.4mm
Ø5" /
127mm
4x 5/16" - 24UNF
4x 3/8" - 16UNC
Ø7.75" /
196.9mm
Ø6.5" /
165.1mm
Maintenance
4x 7/16" - 14UNC
ITEM 61614
For technical questions, please call 1-888-866-5797.
Page 31
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • 1-888-866-5797