13 HP
ENGINE MANUAL
Set up, Operating, and Servicing
Instructions
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.
Distributed exclusively by Harbor Freight Tools®.
3491 Mission Oaks Blvd., Camarillo, CA 93012
Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
Save this manual.
Copyright© 2009 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.
For technical questions or replacement parts, please call 1-800-444-3353.
Contents
Important SAFETY
Information............................ 3
Technical Specifications.... 7
UNPACKING.................................. 7
Set Up Instructions............... 8
Operating Instructions...... 8
Primary Engine Components.. 8
Pre-Start Checks........................ 9
Starting the Engine................. 10
Charging System Circuit
Protector................................. 11
To Stop The Engine................... 11
Servicing.................................. 12
Maintenance Procedures..... 12
Cleaning, Maintenance, and
Lubrication Schedule.......... 13
Storage........................................ 14
Troubleshooting...................... 16
Parts List................................. 18
Assembly Diagram................ 20
LIMITED 90 DAY WARRANTY.... 21
Emission Control System
Warranty.............................. 21
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 2
Save This Manual
NOTICE is used to
address practices
not related to personal injury.
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.
CAUTION, without
the safety alert
symbol, is used to address
practices not related to
personal injury.
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.
Important SAFETY
Information
In this manual, on the labeling,
and all other information
provided with this product:
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.
DANGER indicates
a hazardous
situation which, if not
avoided, will result in death or
serious injury.
WARNING
indicates a
hazardous situation which, if
not avoided, could result in
death or serious injury.
CAUTION, used
with the safety
alert symbol, indicates a
hazardous situation which, if
not avoided, could result in
minor or moderate injury.
13 HP Engine
SAVE THESE INSTRUCTIONS
Set up precautions
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.
2.
Have multiple ABC class fire extinguishers nearby.
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.
4.
Set up and use only on a flat, level,
well-ventilated surface.
For technical questions, please call 1-800-444-3353.
PAGE 3
5.
6.
Wear ANSI-approved safety goggles,
heavy-duty work gloves, and dust
mask/respirator during set up.
Use only lubricants and fuel recommended in the Specifications chart of
this manual.
Operating precautions
1.
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.
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.
2.
Keep children away from the equipment, especially while it is operating.
3.
Keep all spectators at least six feet
from the Engine during operation.
4.
Fire Hazard! Do not fill gas tank
while engine is running. Do not operate if gasoline has been spilled.
Clean spilled gasoline before starting
13 HP Engine
engine. Do not operate near pilot light
or open flame.
5.
Do not touch engine during use. Let
engine cool down after use.
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.
Only use sturdy loading ramps with
sufficient weight bearing capacity.
Secure the Engine on transport vehicles to prevent the tool from rolling,
slipping, and tilting.
9.
Industrial applications must follow
OSHA requirements.
10. Do not leave the equipment unattended when it is running. Turn off
the equipment (and remove safety
keys, if available) before leaving the
work area.
11. Engine can produce high noise levels. Prolonged exposure to noise
levels above 85 dBA is hazardous to
hearing. Always wear ear protection
when operating or working around
the gas engine while it is operating.
12. Wear ANSI-approved safety glasses,
hearing protection, and NIOSH-approved dust mask/respirator under a
full face shield along with steel-toed
work boots during use.
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 neces-
For technical questions, please call 1-800-444-3353.
PAGE 4
sary when near the engine’s magneto
or recoil starter.
22. Do not cover the engine or equipment
during operation.
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.
23. Keep the equipment, engine, and surrounding area clean at all times.
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.
16. Stay alert, watch what you are doing
and use common sense when operating this piece of equipment. Do not
use this piece of equipment while
tired or under the influence of drugs,
alcohol or medication.
17. Do not overreach. Keep proper footing and balance at all times. This enables better control of the equipment
in unexpected situations.
18. Use this equipment with both hands
only. Using equipment with only
one hand can easily result in loss of
control.
19. Keep hands and feet away from
moving parts. Do not reach over or
across equipment while operating.
20. 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.
21. Parts, especially exhaust system
components, get very hot during use.
Stay clear of hot parts.
13 HP Engine
24. 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.
25. Do not operate the equipment with
known leaks in the engine’s fuel system.
26. 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.)
27. 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.
28. 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.
29. Use the correct equipment for the
application. Do not modify the equipment and do not use the equipment
For technical questions, please call 1-800-444-3353.
PAGE 5
for a purpose for which it is not intended.
Service precautions
1.
Before service, maintenance, or
cleaning:
a.Remove the Ignition Key and
close the Fuel Valve.
certain 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.
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.
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.
Do not alter or adjust any part of
the 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.
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.
b.Allow the engine to cool completely.
c. Then, remove the spark plug
wire(s) from the spark plug(s).
2.
3.
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 un-
13 HP Engine
Save these
instructions.
For technical questions, please call 1-800-444-3353.
PAGE 6
Technical
Specifications
Engine Type
13 HP Horizontal Single
Cylinder 4 stroke
Forced air cooled
88mm x 64mm
389cc
8.0:1
Cooling System
Bore x Stroke
Displacement
Compression Ratio
Rotation viewed from PTO Counterclockwise
(power takeoff - the output shaft)
UNPACKING
When unpacking, make sure that the
item is intact and undamaged. If any parts
are missing or broken, please call Harbor
Freight Tools at 1-800-444-3353 as soon
as possible.
Ø 1” x 2-7/8” Long
1/ ” Keyway
Shaft Size
4
3/ ”-24 UNF inner thread
8
89+ octane unleaded
Fuel
Type
gasoline
10W30 above 32° F
Type SAE
5W30 at 32° F or below
Engine Oil
Capacity 0.63 Quarts
Type
BPR6ES (NGK), F7TC
Spark Plug
Gap
0.7~ 0.8mm
Intake
0.15 ± 0.02 mm
Valve
Clearance Exhaust
0.20 ± 0.02 mm
Idle Speed
1,500 ± 150 RPM
EPA Only Model: The emission control system for this Engine is warranted for
standards set by the U.S. Environmental
Protection Agency. For warranty information, refer to the last pages of this manual.
EPA/CARB Model: The emission
control system for this Generator’s 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.
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.
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 7
Set Up Instructions
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.
Operating Instructions
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.
Risk of accidental
Primary Engine Components
starting; resulting
Fuel
in serious personal injury.
Cap
Remove the Ignition Key,
close the Fuel Valve, wait for
the engine to cool, and unplug Spark
Starter
the spark plug wire(s) before
Plug
Handle
assembling or making any
adjustments to the equipment.
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.
Note: For additional information regarding
the parts listed in the following pages,
refer to the Parts Lists and Diagrams
near the end of this manual.
13 HP Engine
Choke
Air
Cleaner
Throttle
Fuel Valve
Throttle: Move left to open and increase
engine speed or move right to close
and decrease engine speed. Idle
speed is the engine speed when the
throttle is closed.
Choke: Move left to close choke (for cold
starting), move right to open it (for
running).
Fuel Valve: Turn clockwise to close fuel
valve, turn counterclockwise to open
fuel valve.
For technical questions, please call 1-800-444-3353.
PAGE 8
tween the high and low marks on the
Dipstick.
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.
4.
If the oil level is below the end of the
dipstick add the appropriate type of
oil until the oil level is between the
high and the low marks.
Oil type:
above 32° F = SAE 10W-30
32° F or below = SAE 5W-30
CAUTION 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.
5.
Replace the Dipstick by threading it
clockwise.
1.
1.
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.
2.
Clean the Fuel Cap and the area
around it.
3.
Unscrew and remove the Fuel Cap.
Clean the top of the Dipstick and the
area around it. Remove the Dipstick
by threading it counterclockwise, and
wipe it off with a clean rag.
4.
If needed, fill the Fuel Tank up to the
base of the fill neck, but not above,
with 89 octane or better unleaded
gasoline.
High Mark
5.
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.
Checking and Filling Engine Oil
Remove the Ignition Key and close
the Fuel Valve.
CAUTION! Do not run the engine with too
little or too much oil. The engine will
be permanently damaged.
Checking Fuel Level
Dipstick
Oil Drain
Plug
2.
Low Mark
Dipstick
3.
Reinsert the Dipstick without threading it in and remove it to check the oil
level. The oil level should be be-
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 9
to 5 seconds.
Note: To prolong starter life, use
short starting cycles (5 seconds maximum). Then wait one minute before
attempting to start again.
Starting the Engine
Start Procedure
Before starting the engine:
a.Follow the Set Up Instructions to prepare the equipment.
b.Inspect the equipment and
engine.
c. Fill the engine with the proper amount and type of both
fuel and oil.
d.Read the Equipment Operation section that follows.
1.
Open the Fuel Valve.
2.
Close the Throttle.
3.
To start a cold engine, close the
Choke. To re-start a warm engine,
leave the Choke open.
4.
6.
Certain pieces of equipment, such as
air compressors, may need to have
the pressure relieved to allow proper
engine starting. Consult equipment
manual and open the pilot valve if
equipped.
Starter Control Panel
Start
Ignition Switch
Ignition
Switch
Charging System
Circuit Protector
(Close-up)
5a. To start the engine using the electric
starter:
Insert the ignition key into the ignition
and turn it to Start (S position) for up
13 HP Engine
7.
IMPORTANT: Allow the engine to
run at no load for five minutes with no
load after each start-up so that the
engine can stabilize.
8.
Close the pilot valve on the equipment (if equipped). Adjust the Throttle as needed.
Break-in Period
S
S
0
Off
Allow the Engine to run for several seconds. Then, if the Choke is
closed, open it.
Note: Moving the Choke too fast could kill
the engine.
Charging System
Overload Indicator
0
Run
5b. To start the engine manually:
Insert the ignition key into the Ignition
and turn the Key to Run (I position).
Grasp the starter handle, and pull
slowly until resistance is felt. While
holding the handle, allow the starter
rope to rewind slowly. Then, pull the
starter handle with a rapid, full arm
stroke. Once again while holding
the handle, allow the rope to rewind
slowly. Repeat as necessary, until
the engine starts.
1.
Breaking-in the engine will help to
ensure proper equipment and engine
operation.
2.
The operational break-in period will
last about 3 hours of use. During this
period:
• Do not apply a heavy load to the
equipment.
For technical questions, please call 1-800-444-3353.
PAGE 10
• Do not operate the engine at its
maximum speed.
3.
The maintenance break-in period will
last about 20 hours of use. After this
period:
• Change the engine oil.
Under normal operating conditions
subsequent maintenance follows the
schedule explained in the Servicing section.
Charging System Circuit
Protector
1.
If the Charging System Overload Indicator lights, it means that the battery
is not charging correctly.
2.
Possible issues include:
a.A short in the battery charging
circuit.
b.Incorrect battery connection.
c. Faulty battery.
d.Charging System Circuit Protector is
tripped.
3.
To prevent battery drain, have a
qualified technician repair the problem as soon as possible.
4.
After diagnosing and repairing any
issues, push the Charging System
Circuit Protector to allow the battery
to charge again.
To Stop The Engine
1.
Close the Throttle.
2.
Turn the Ignition Key to off (0 position) and remove it.
3.
Close the Fuel Valve.
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 11
Servicing
3.
Replace the drain plug and tighten it.
4. Refill the oil to the proper level followRisk of serious
ing the instructions under the Checkpersonal injury
ing the Oil Level section on page 9 of
from accidental starting.
this manual.
Remove the Ignition Key,
close the Fuel Valve, wait for
Air Filter Element Maintenance
the engine to cool, and unplug
the spark plug wire(s) before
1. Remove the air filter cover and the
performing any inspection,
air filter elements and check for dirt.
maintenance, or cleaning
Clean as described below, or replace
procedures.
if necessary.
Damaged equipment can fail,
causing serious personal
injury. Do not use damaged
equipment. If abnormal noise,
vibration, or excess smoking
occurs, have the problem
corrected before further use.
2.
• For “paper” filter elements:
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 air filter. If this does not get the
filter reasonably clean, replace it.
Maintenance Procedures
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.
• For foam filter elements:
Wash the element 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.
3.
Engine Oil Change
CAUTION! Oil is very hot during operation and can cause burns. Wait for
engine to cool before changing oil.
1.
Place a drain pan (not included) underneath the crankcase’s drain plug.
2.
Remove the drain plug and, if possible, tilt the crankcase slightly to help
drain the oil out. Recycle used oil.
13 HP Engine
Cleaning:
Install the new filter or the cleaned
filter. Secure the Air Cleaner Cover
before use.
Spark Plug Maintenance
1.
Disconnect spark plug wire from
end of plug. Clean out debris from
around spark plug.
2.
Using a spark plug wrench, remove
the spark plug.
For technical questions, please call 1-800-444-3353.
PAGE 12
3.
4.
5.
6.
Inspect the spark plug:
If the electrode is oily, clean it using a
clean, dry rag.
If the electrode has deposits on it,
polish it using emery paper.
If the white insulator is cracked or
chipped, the spark plug needs to be
replaced.
When installing a new spark plug, adjust the plug’s gap to the specification
on the Technical Specifications chart.
Do not pry against the electrode, the
spark plug can be damaged.
Install the new spark plug or the
cleaned spark plug into the engine.
Gasket-style: Finger-tighten until the
gasket contacts the cylinder head,
then about 1/2-2/3 turn more.
Non-gasket-style: Finger-tighten until
the plug contacts the head, then
about 1/16 turn more.
Apply a small amount of dielectric
grease (not included) to the insulator
of the spark plug and attach the wire
securely to the spark plug.
Fuel Filter Replacement
filter (be aware of fuel inlet and outlet
nozzles).
4.
Remove pipe clamps from both ends
of the fuel filter. Take note of the fuel
filter’s orientation. Twist off filter from
hoses. Allow fuel to drain onto the
container.
5.
Install new fuel filter in the same
orientation. Make sure to properly
secure both fuel lines. Remove hose
pinch pliers.
6.
Inspect hoses for damage and replace if needed.
7.
Clean up and properly dispose of all
fuel.
8.
Wait for at least one hour before use
to allow all residual fuel vapors to
dissipate. To prevent fire, do not
start the engine while the smell of
fuel hangs in the air. Open the fuel
valve before restarting the engine.
It may take a little longer than usual
to start the engine because the fuel
needs to refill the fuel line and new
filter.
WARNING! Risk of fire
or explosion. Replace the
fuel filter in a well-ventilated
area away from ignition sources. Do not smoke.
1.
Wait for engine to cool completely
before proceeding.
2.
Wear protective gear including, ANSIapproved safety goggles, NIOSHapproved dust mask/respirator, and
nitrile gloves.
3.
Use a hose pinch pliers (not supplied)
to pinch the hose just above the fuel
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 13
Cleaning, Maintenance, and
Lubrication Schedule
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.
Before Each Use:
a.Check engine oil level.
b.Check air cleaner.
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.
After First Month or 25 Operation Hour
Break-in Period:
After Every Year or 300 Operation
Hours:
a.Check/adjust idle speed.**
b.Check/adjust valve clearance.**
c. Clean carburetor.
d.Clean fuel tank and strainer.**
e.Clean carbon build-up from combustion chamber.
After Every 2 years:
Replace fuel line if necessary.**
Note: All maintenance procedures scheduled for 25, 50, and 100 operation
hours should be performed at least
yearly.
* Service more frequently when used in
dusty areas.
**These items should be serviced by a
qualified service technician.
Storage
a.Change engine oil.
1.
b.Check Float Chamber for sediment,
clean if needed.
Wait for engine to cool, then clean
engine with clean cloth.
2.
When the equipment is to remain idle
for longer than 20 days, prepare the
engine for storage as follows:
After Every 3 Months or 50 Operation
Hours:
Clean or replace air cleaner.*
After Every 6 Months or 100 Operation
Hours:
a.Change engine oil.
b.Check and clean spark plug.
c. Service/replace spark arrestor.**
a.Change engine oil and empty fuel
tank.
b.Either leave fuel tank empty or
refill fuel tank with fresh unleaded
gasoline mixed with a fuel stabilizer
intended for long term engine storage (not included). After filling, run
engine for about 5-10 minutes to circulate the treated gasoline through
the carburetor. Wait for engine to
cool before proceeding.
c. Clean out area around spark plug.
Remove spark plug and pour one
13 HP Engine
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PAGE 14
tablespoon of engine oil into cylinder
through spark plug hole.
d.Replace spark plug, but leave spark
plug wire disconnected.
e.Pull Starter Handle to distribute oil
in cylinder. Pull engine through one
or two revolutions. Stop when you
feel the piston start the compression
stroke (when you start to feel resistance).
f. Disconnect battery cables (if
equipped).
3.
Apply a thin coat of rust preventive oil
to all metal parts.
4.
Cover and store in a dry, well-ventilated area out of reach of children.
5.
Before starting the engine 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 properly.
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 15
Troubleshooting
Problem
Possible Causes
Engine will not
start
Fuel Related:
1. No fuel in tank or fuel valve closed.
2. Choke not closed.
3. Low quality or deteriorated, old
gasoline.
4. Carburetor not primed.
Probable Solutions
Fuel Related:
1. Fill fuel tank and open fuel valve.
2. Close choke if engine cold.
3. Use only fresh 89+ octane unleaded
gasoline.
4. Pull on Starter Handle to prime.
5. Dirty fuel passageways blocking
fuel flow.
5. Clean out passageways using fuel
additive. Heavy deposits may require
further cleaning.
6. Carburetor needle stuck. Fuel can
6. Gently tap side of carburetor float
be smelled in the air.
chamber with screwdriver handle.
7. Too much fuel in chamber. This can 7. Open Choke. Remove spark plug and
be caused by the carburetor needle
pull the start handle several times to air
sticking.
out the chamber. Reinstall spark plug
and close Choke.
8. Clogged Fuel Filter.
8. Replace Fuel Filter.
Ignition (spark) Related:
1. Spark plug wire not connected
securely.
2. Spark plug electrode wet or dirty.
3. Incorrect spark plug gap.
4. Spark plug wire broken.
5. Incorrect spark timing or faulty
ignition system.
Ignition (spark) Related:
1. Connect spark plug wire properly.
Compression Related:
1. Cylinder not lubricated. Problem
after long storage periods.
Compression Related:
1. Pour tablespoon of oil into spark plug
hole. Crank engine a few times and try
to start again.
2. Tighten spark plug. If that does not
work, replace spark plug. If problem
persists, may have head gasket
problem, see #3 to the left.
3. Tighten head. If that does not remedy
problem, replace head gasket.
2. Loose or broken spark plug.
(Hissing noise will occur when
trying to start.)
3. Loose cylinder head or damaged
head gasket. (Hissing noise will
occur when trying to start.)
4. Engine valves or tappets misadjusted or stuck.
2. Clean spark plug.
3. Correct spark plug gap.
4. Replace spark plug wire.
5. Have qualified technician diagnose/
repair ignition system.
4. Have qualified technician diagnose/
repair ignition system.
Follow all safety precautions whenever diagnosing or servicing the
equipment or engine.
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 16
Troubleshooting
Problem
Possible Causes
Engine misfires 1. Spark plug wire loose.
2. Incorrect spark plug gap or
damaged spark plug.
3. Defective spark plug wire.
4. Old or low quality gasoline.
5. Incorrect compression.
Engine stops
suddenly
1. Low oil shutdown.
2. Fuel tank empty or full of impure or
low quality gasoline.
3. Defective fuel tank cap creating
vacuum, preventing proper fuel
flow.
4. Faulty magneto.
5. Clogged Fuel Filter
Probable Solutions
1. Check wire connections.
2. Re-gap or replace spark plug.
3. Replace spark plug wire.
4. Use only fresh 89+ octane unleaded
gasoline.
5. Diagnose and repair compression.
(Use Engine will not start:
Compression Related section.)
1. Fill engine oil to proper level. Check
engine oil before EVERY use.
2. Fill fuel tank with fresh 89+ octane
unleaded gasoline.
3. Test/replace fuel tank cap.
4. Have qualified technician service
magneto.
5. Replace Fuel Filter.
Engine stops
when under
heavy load
1. Dirty air filter.
2. Clogged Fuel Filter.
3. Engine running cold.
1. Clean or replace element.
2. Replace Fuel Filter.
3. Allow engine to warm up prior to
operating equipment.
Engine knocks
1. Old or low quality gasoline.
1. Fill fuel tank with fresh 89+ octane
unleaded gasoline.
2. Do not exceed equipment’s load rating.
3. Have qualified technician diagnose and
service engine.
2. Engine overloaded.
3. Incorrect spark timing, deposit
buildup, worn engine, or other
mechanical problems.
Engine
backfires
1. Impure or low quality gasoline.
2. Engine too cold.
3. Intake valve stuck or overheated
engine.
1. Fill fuel tank with fresh 89+ octane
unleaded gasoline.
2. Use cold weather fuel and oil additives
to prevent backfiring.
3. Have qualified technician diagnose and
service engine.
Follow all safety precautions whenever diagnosing or servicing the
equipment or engine.
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 17
Part
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
Description
Washer
Drain plug
Oil seal, crankshaft
Seal
Diode
Crankcase
Oil seal, regulating sway bar
Washer
Split pin
Regulating sway bar
Bolt M6×14
Oil sensor
Piston ring set
Piston pin circlip
Piston
Piston pin
Connecting rod assy
Woodruff key
Bearing 6206
Crankshaft assy
Oil plug with Seal
Oil plug
Seal
Crankcase cover
Driven gear, regulator assy
Gasket, crankcase
Set pin
Dipstick
Dipstick with seal
Bearing 6206
Oil seal, crankshaft
Bolt M8×35
Nut M8
Exhaust pipe
Exhaust pipe gasket
Muffler gasket
Muffler assy
Bolt
Cylinder head cover Assy
Gasket, cylinder head cover
Bolt
Lead wind cover
Stud
Gasket, cylinder head
Set pin
Cylinder head Assy
Spark plug F7RTCU
Stud
Air duct
Seal
Parts List
Qty
2
2
1
1
1
1
1
1
1
1
2
1
1
2
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
1
1
7
2
1
1
1
1
1
1
1
4
1
2
1
2
1
1
2
1
1
Part
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83a
83b
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
Description
Nut M6
Air cleaner
Inlet gasket
Connecting block
Carburetor gasket
Air cleaner gasket
Carburetor Assy
Fan hood assy
Bolt M6×12
Engine switch
Wire grommet
Clip
Plastic clip
Bolt M6×8
Recoil starter assy
Nut M16×1.25
Starting flange
Flywheel fan
Flywheel
Screw M6×25
Engine stop cable
Ignition coil
Spark plug cap
Ignition coil assy
Pipe
Outlet pipe (EPA qty 1)
Pipe clamp (EPA qty 2)
Connector (EPA qty 1)
Bolt M8×25
Nut M8
Fuel tank
Filter cup
Fuel cap (EPA+CARB version)
Fuel cap (EPA only version)
Regulating frame assy
Back spring
Lock bolt
Regulating arm
Nut M6
Fine regulating spring
Pulling rod
Lock nut
Sleeve
Valve rocker
Adjusting bolt for valve gap
Pusher guide
Pusher
Tappet
Camshaft assy
Exhaust valve
Qty
2
1
1
1
1
1
1
1
5
1
1
1
1
3
1
1
1
1
1
2
1
1
1
1
1
2
4
2
2
2
1
1
1
1
1
1
1
1
2
1
1
2
2
2
2
1
2
2
1
1
Note: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts.
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 18
Parts List (continued)
Part
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
Description
Intake valve
Spring retainer, exhaust valve
Valve spring
Spring seat, exhaust valve
Spring seat, intake valve
Cap
Bearing 6202
Balancing shaft
Fuel tank connect
Bolt M8×20
Fuel tank shock pad
Relay, Start-Up
Rotor Comp
Starting Clutch
Starter Motor Assy.
Base, Starter
Housing, Starter Clutch
Drive Gear
Brush, Comp.
Stator Assy.
Spring, Brush
Reducing Gear
Stay, Brush
Cable, Starter Motor
Insulator
Bolt (M5x14)
Screw (M4x6)
Packing Ring
Screw (M5x32)
Nut (M6)
Qty
1
1
2
1
1
1
2
1
1
2
2
1
1
1
1
1
1
1
4
1
4
1
1
1
1
2
1
1
4
2
Part
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154a
155a
156a
157a
Description
Bolt (M6x35)
Spring Washer (4mm)
Screw (M4x14)
Washer (4mm)
Set Pin (8x14)
Clamp Ring
Gasket
Bolt (M4x10)
Control Front Cover
Diode
Nut (M4)
Fixed Mount
Ignition Switch
Safety
Diode Assy.
Control Rear Cover
Attachment Bolt
Protector
Fixed Mount
Spring
Cover
Protector Assy.
Bolt (M3x12)
Ignition Key
Secondary filling valve
(CARB only)
Bracket (CARB only)
Carbon irrigation connector
(CARB only)
Fuel pipe (CARB only)
Qty
2
3
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
PLEASE READ THE FOLLOWING CAREFULLY
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.
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 19
Assembly Diagram
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 20
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.
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.
13 HP Engine
This warranty gives you specific legal
rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box
6009 • Camarillo, CA 93011 • (800)
444-3353
Emission Control
System Warranty
California and United States Emission Control
Defects Warranty Statement (EPA/CARB Model)
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 emission control system warranty on your 1995 and later Small Off-Road Engine
(herein engine). In California, the engine must be designed, built
and equipped to meet the State’s stringent anti-smog standards.
Elsewhere within the United States, new off-road, spark-ignition
engines certified for model year 1997 and later, must meet similar
standards set forth by the EPA. HFT must warrant the emission
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.
Your emission 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 emissionrelated assemblies.
Where a warrantable condition exists, HFT will repair your
engine at no cost to you including diagnosis, parts and labor.
United States Emission Control Defects
Warranty Statement (EPA only model)
The United States Environmental Protection Agency (herein
EPA) and Harbor Freight Tools (herein HFT) are pleased to explain
the emission control system warranty on your 1997 and later Small
Off-Road Engine (herein engine). Within the United States, new
off-road, spark-ignition engines certified for model year 1997 and
later, must be designed, built and equipped to meet the stringent
anti-smog standards set forth by the EPA. HFT must warrant the
emission 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.
Your emission 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 emissionrelated assemblies.
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 1997 and later engines are warranted for two (2) years.
If any emission-related part on your engine is defective, the part
will be repaired or replaced by HFT.
For technical questions, please call 1-800-444-3353.
PAGE 21
Harbor Freight Tools Emission Control Defects
Warranty Coverage
Engines are warranted for a period of two (2) years relative to
emission control parts defects, subject to the provisions set forth
below. If any emission related part on your engine is defective, the
part will be repaired or replaced by HFT.
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 1-800-444-3353.
Harbor Freight Tools Emission Control Defects
Warranty Provisions
1. Length of Coverage
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
1-800-444-3353.
3.Consequential Damages Coverage
c)
d)
e)
f)
Failure to follow recommendations on fuel use contained
in the Owner’s Manual
Improper or inadequate maintenance of any warranted
parts
Repairs performed outside of the authorized warranty
service dealers
Alterations by changing, adding to or removing parts
from the engine.
5. Service and Maintenance
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)
Fuel Metering System
i) Carburetor and its internal parts.
ii) Fuel pump (if so equipped).
iii) Cold start enrichment system.
2) Air Induction System
i) Intake pipe/manifold.
ii) Air cleaner.
3) Ignition System
i) Spark plug.
ii) Magneto ignition system.
4)Catalyst System (if so equipped)
i) Exhaust pipe stud.
ii) Muffler.
iii) Catalytic converter (if so equipped).
5) Miscellaneous Items Used in Above Systems
i) Vacuum, temperature and time sensitive valves
and switches.
ii) Hoses, belts, connectors, and assemblies.
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.
4.Coverage Exclusions
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
13 HP Engine
For technical questions, please call 1-800-444-3353.
PAGE 22