446s CHAIN SAW - ECHO Depend on it

• Read this manual and familiarize yourself with its contents.
• This machine is designed for cutting wood and timber.
Use only for designated purpose.
WARNING! • Minimize the risk of injury to yourself and others.
• Always wear eye protection when operating this machine.
• Do not operate or service this machine unless you clearly understand this manual.
• Keep this manual available at all times so that you can reference it whenever you
have a question about the use of this unit.
Part Number 69025-94310 Rev. 3/05
Attention Statements
The Shindaiwa 446s chain saw is
designed and built to deliver superior
performance and reliability without
compromise to quality, comfort,
safety, or durability. Shindaiwa high
performance engines represent
the leading edge of 2-cycle engine
technology, and deliver exceptionally
high power at remarkably low
displacement and weight. As a
professional owner/operator, you’ll soon
discover why Shindaiwa is simply in a
class by itself.
The information contained in this
manual describes units available at
the time of production. While every
attempt has been made to give you
the very latest information about your
Shindaiwa 446s chain saw, there may
be some differences between your saw
and what is described here. Shindaiwa
Inc. reserves the right to make changes
in production without prior notice, and
without obligation to make alterations to
units previously manufactured.
Attention Statements ........................... 2
Labels and Symbols ............................. 5
Unit Description ................................... 6
Technical Specifications ...................... 6
Installing and Adjusting the
Guide Bar and Saw Chain ................... 7
Mixing/Filling Fuel ............................. 8
Bar Oil ................................................... 8
Starting the Engine .............................. 9
Stopping the Engine .......................... 10
Carburetor Adjustments .................... 10
Chain Brake ........................................ 11
Cutting with the Saw .......................... 12
Maintenance ....................................... 14
Saw Chain Performance .................... 16
Troubleshooting................................. 17
Declaration of Conformity................. 19
Throughout this manual are special
“Attention Statements”.
A statement preceded by the
triangular attention symbol
and the word “WARNING” contains
information that should be acted
upon to prevent serious bodily injury.
A statement preceded by the word
“CAUTION” contains information
that should be acted upon to prevent
mechanical damage.
A statement preceded by the word
“IMPORTANT” is one that possesses
special significance.
A statement preceded by the word
“NOTE” contains information that is handy
to know and may make your job easier.
Read and follow the Operator’s
Manual. Failure to do so could
result in serious injury.
Beware of Kickback! Kickback
can occur whenever the tip of the
guide bar touches an object while
the saw is operating. Kickback
may force the bar up and back
toward the operator with a
lightning-fast reaction!
Wear eye and hearing protection
at all times during the operation
of this unit.
Sound Power Level
(measured in accordance with
All chain saw service, other than the
items listed in the owner’s manual
maintenance instructions, should be
performed by trained Shindaiwa chain
saw service personnel. (For example, if
improper tools are used to remove the
flywheel, or if an improper tool is used to
hold the flywheel in order to remove the
clutch, structural damage to the flywheel
could occur and could subsequently
cause the flywheel to burst.)
Kickback Safety
This saw is equipped with the following
safety equipment:
can happen
1. Inertia chain brake.
 Activating the chain brake tightens
a brake band around the chain drive
mechanism, stopping all chain
rotation. When sudden kickback
occurs, the chain break is automatically actuated and the chain stops
instantly. The chain brake can also be
activated manually.
To reduce the risk of
kickback, all of the above
devices must be properly installed
and in good repair!
Brake engagement and
operation depend upon
proper chain break condition! For
proper chain brake testing and
adjustment procedures, refer to
Page 11.
Kickback Safety Precautions
Either of the following reactions could
cause you to lose control of your saw
while cutting, possibly resulting in
serious injury!
 Sudden surprise can contribute to accidents! With a basic understanding of
kickback, you can reduce or eliminate
the element of surprise.
1. Kickback can occur whenever the
guide bar nose or tip contact an object
while the saw is running. Tip contact
may cause the guide bar to kick
upward and back toward the operator
with a lightning-fast reaction!
 Clear obstructions from the work
area before cutting. Remove any log,
branch, or other obstruction that
might contact the guide bar tip during
cutting operations.
2. Pinching the saw along the top of the
guide bar may push the guide bar
rapidly back toward the operator!
Pinching can occur whenever wood
closes in around the moving chain!
Do not rely exclusively on the safety
devices incorporated with your saw. As a
chain saw user, observing the following
steps will also help you to avoid accident
or injury on the job:
 Grip the saw firmly with your right
hand on the rear handle and your left
hand on the front handle, thumbs
and fingers encircling the handles
whenever the saw is running. Don’t
let go: A firm grip will help you to
reduce kickback while maintaining
control of the saw.
 Do not overreach or attempt to cut
above shoulder height.
 Follow the manufacturer’s
instructions for sharpening and
maintenance of the saw chain.
 Use only the replacement bar and
chain combinations specified by the
 Never stand directly over the saw
while cutting!
 Use low-kickback chain, chain brakes,
or special guide bars to reduce the
risk of kickback.
 Accelerate the saw before the
chain contacts the work area, and
always maintain high engine speeds
throughout the cut.
Additional Safety Precautions
 Never operate this chain saw with
one hand! One-handed operation
could cause you to lose control,
causing serious injury to yourself
or others! A chain saw is intended
for two-handed use.
 Never operate this chain saw
if you are fatigued or if you are
under the influence of alcohol,
drugs, or any other substance
that could affect your ability or
 Wear safety footwear, snug-fitting
clothing, protective gloves, and
eye, hearing, and head-protection
devices while working with this
chain saw.
 Never operate a saw that is
damaged, improperly adjusted,
or not completely and securely
 Do not allow other persons to be
near the chain saw when starting
or running the chain saw. Keep
bystanders and animals out of the
work area.
 Never allow young children or any
person unfamiliar with chain saws
to operate this saw!
 Clear the work area before using
the saw. Never start cutting until
you are sure you have a secure
footing and have planned a retreat
path from the falling tree.
 Before starting the saw engine,
make sure nothing is touching the
saw chain.
 Keep all parts of your body away
from the saw chain whenever the
engine is running!
 Stop the engine before carrying
the saw. Carry the saw with the
engine stopped, the guide bar and
saw chain pointing to the rear, and
the engine muffler away from your
 Stop the engine before setting the
chain saw down.
 Install the appropriate guide-bar
chain cover before transporting
the saw.
 Do not use this saw if the saw
chain continues to move after the
throttle control trigger is released.
 Use only Shindaiwa-recommended
parts when repairing or servicing
this saw.
 Use extra care when cutting a
limb that is under tension! A limb
under tension could spring back
suddenly, causing you to lose
control of the saw!
 Use extreme caution when cutting
smaller brush and saplings! Smalldiameter material may catch in the
chain and be whipped toward you
or pull you off balance, causing
you to lose control of the saw!
 Operate the saw only in a well
ventilated area. Exhaust gases
and lubrication oil mist can cause
serious injury or death.
 Keep the saw handles dry, clean
and free of oil or fuel mixture.
 Never operate any saw while
in a tree unless you have been
specifically trained to do so!
 Never perform service or repairs
to this saw unless you are
specifically trained and equipped
to do so!
 Improper maintenance, use of
nonconforming replacement
components, or the removal of
safety devices, such as the chain
brake or any of the chain brake
components, could result in
serious injury.
 Never allow any part of your
body near the clutch cover of an
operating saw.
 Never operate a saw with
damaged or missing anti-vibration
cushions. Long-term exposure to
vibration can damage your hands,
in particular vascular, bone or
joint, neurological or muscular
disorders. For lowest vibration,
replace damaged mounts
immediately. Mounts hardened
due to age or weathering should
also be replaced.
 Always maintain a firm footing
while operating this saw! Ladders
and other temporary platforms
can shift unexpectedly, and are not
 Do not operate this or any other
chain saw with the muffler
 All chain saw service, other
than items listed in the owner’s
maintenance instructions,
should be performed by trained
Shindaiwa chain saw service
 Prolonged exposure to excessive
noise is fatiguing and could lead
to impaired hearing. The use of
proper ear protection can reduce
this potential hazard.
Safety Labels
Safety and Operation Information Labels:
Make sure all information labels are
undamaged and readable. Immediately
replace damaged or missing information
labels. New labels are available from
your local authorized Shindaiwa dealer.
Bar and Chain Oil Tank
Fuel Tank
Carburetor Adjustment
Idle Speed
Chain Brake Function
Unit Description
The operational procedures described
in this manual are intended to help
you get the most from this unit and
also to protect you and others from
harm. These procedures are general
guidelines only, and are not intended to
replace any additional safety rules or
laws that may be in force in your area.
If you have any questions regarding
your Shindaiwa chain saw, or if you
do not understand something in this
manual, your Shindaiwa dealer will
be glad to assist you. For additional
information, you may also contact
Shindaiwa Inc. at the address printed
on the back of this manual.
Tools Included
Guide Bar
Chain Cover
Air Cleaner Cover
Brake Lever
Hand Guard
Front Handle
Bar and Chain
Oil Filler Cap
Starter Handle
Rear Handle
Fuel Cap
 Spark plug/13 mm socket wrench
Do not make unauthorized
modifications to this saw,
guide bar, or chain!
The terms “left”, “left-hand”, and
“LH”; “right”, “right-hand”, and “RH”;
“front” and “rear” refer to directions as
viewed by the operator during normal
Rear Hand
Clutch Cover
Bar Nuts
Chain Catcher
Using the accompanying illustrations as
a guide, familiarize yourself with your
machine and its various components.
Understanding your machine helps
ensure top performance, long service
life, and safer operation.
Model Name .................................................................... 446s
Displacement ...................................................... 44.6 cm3
Bore X Stroke ................................................... 41.5 x 33 mm
Maximum Power Output *1) ................................... 2.19 kW
Recommended Maximum Engine Speed *2) ... 13,500 min-1
Recommended Engine Speed at Idling ............... 2,800 min-1
Chain Type ..... Blount type 21 BP, pitch 0.325”, gauge 0.058”
Number of Rim Tooth ........................................................... 7
Specified Pitch of Drive Sprocket................................0.325”
Starting............................................................. Recoil Starter
Ignition ........................................ Electronic ignition system
Engine Type .................................... 2-cycle, vertical cylinder,
Spark Plug...................................................... NGK BPMR7A
Power Transmission .............Automatic Centrifugal Clutch
Cooling System ..................................................... Forced Air
Handle ...............................................................Anti-vibration
Safety Devices .....................................In conformity with the
Carburetor .............................................................Diaphragm
Fuel ............................................................... Gasoline 2-cycle
mixing oil mixture 50:1
Fuel Tank Capacity ......................................................540 ml
Oil Tank Capacity .........................................................270 ml
Recommended Bar Size .............. 33 cm (13”), 38 cm (15”),
40 cm (16”), 45 cm (18”)
Recommended Bar Type........................Sprocket Nose Bar
*1) measured in accordance with ISO 7293
*2) with bar and chain
CE Mark regulations
Chain Lubrication................ Automatic adjustable flow rate
Weight (less bar/chain) ...............................................4.5 kg
Sound Power Level *3) ........................................ 110 dB (A)
Sound Pressure Level *4) ................................... 101 dB (A)
Vibration Level *5) (Front handle) .........................3.9 m/s2
Vibration Level *5) (Rear Handle) ..........................3.9 m/s2
*3) measured in accordance with ISO 9207
*4) measured in accordance with ISO 7182
*5) measured in accordance with ISO 7505
Installing and Adjusting the Guide Bar and Saw Chain
For longest chain life, place new or
replacement chain loops in oil and soak
overnight before installation.
The chain brake must be completely
disengaged before removing or
installing the clutch cover.
Guide Bar
1. Use the socket wrench to remove the
clutch cover nut(s) in a counterclockwise rotation.
2. Remove the clutch cover.
Clutch Cover
3. Remove and discard the packing
Spacer (discard)
4. Place the guide bar over the guide bar
stud(s) and chain tensioner pin.
Failure to align the guide bar and
chain tensioner pin can cause
serious damage to the clutch
cover, guide bar, tensioner pin,
and/or engine crankcase!
The cutters on the saw
chain are very sharp!
Always wear gloves when handling.
5. Install the chain loop over the drive
sprocket, and then align the chain
drive links within the guide bar
groove. Verify that the cutters are
properly oriented with cutter edges
facing forward on top of bar. If chain
installation is difficult or if the chain
appears too tight, refer to step 8.
6. Install the clutch cover over the bar
stud(s) and install the bar nut(s)
finger tight.
Never operate this saw
without the clutch cover
Proper chain adjustment is essential for
maximum performance, chain life, and
operator safety. Always inspect chain
tension before operating this saw!
Insert Chain Tensioner
Pin into the Hole
Saw Chain
9. Tighten the bar nut(s). The saw
chain tension is correct when there
is not any slack on the bottom of the
guide bar but the saw chain can move
3 - 3.5 mm
Chain Adjusting
Turn Clockwise to
Tighten the Chain
(extend the guide
7. Place the saw on a flat surface and lift
the bar nose slightly.
8. To adjust chain tension:
 Turn the chain tension screw clockwise to tighten the chain.
 Turn the chain tension screw
counter-clockwise to loosen the
 While lifting the bar nose, tighten or
loosen the adjusting screw until the
chain at mid-bar on the bottom of the
bar just contacts the guide bar rails.
Re-Adjusting the Saw Chain
1. To adjust chain tension in the field:
Stop the saw and allow the guide bar
and chain to cool. Loosen both bar
nuts approximately 1-turn each, and
then perform steps 7-9 above. Never
operate the saw with a loose chain!
Check the gap between chain side
plates and the bar rail
Inspect chain tension often
during operation, especially
when breaking in a new chain. A
loose saw chain can jump from the
guide bar, possibly causing serious
personal injury!
Mixing Fuel/Filling With Fuel
Minimize the risk of fire,
burns, and personal injury!
 STOP engine before refueling.
 ALWAYS allow the engine to cool
before refueling!
 ALWAYS open the fuel cap slowly to allow any pressure build-up
in the tank to release fuel vapor
 Avoid overfilling and wipe up all
spilled fuel. Move the engine at
least 3 meters from the fueling
point, storage area and other
readily flammable
materials before restarting!
 ALWAYS inspect the unit for fuel
leaks before each use. During
each refill, make sure there are
no fuel leaks around the fuel cap
and/or tank. If a fuel leak is evident, stop using the unit immediately. Fuel leaks must be repaired
before using the unit.
 NEVER smoke or light any fires
near the engine or fuel source!
 NEVER place any flammable
material near the engine muffler!
 NEVER operate the engine without the muffler in good working
Shindaiwa high-performance 2-cycle
engines are designed to operate on a
50:1 mixture of unleaded gasoline and
2-cycle mixing oil. Using a fuel mixture
less than 50:1 ratio (such as 80:1 or
100:1) can cause catastrophic engine
1. Use only fresh, clean unleaded gasoline with a pump octane rating of 87
or higher.
2. Mix fuel with a 2-cycle mixing oil
designed for use in high-performance
2-cycle air-cooled engines.
2-cycle mixing oil
2.5 l .............................. 50 ml
5 l ................................100 ml
10 l ..............................200 ml
20 l ..............................400 ml
3. Place the saw on a hard surface with
the fuel cap up and wipe any chips or
debris from around the fuel cap.
4. Remove the fuel cap and fill the tank
with clean, fresh 2-cycle fuel mix.
Avoid overfilling and fuel spillage.
5. Wipe any spilled fuel and move the
saw at least 3 meters from the fueling
point before starting the engine.
 Some types of gasoline contain
alcohol. Never use any type of
gasoline containing more than
10% alcohol by volume! More
than 10% alcohol by volume may
affect the lubricating qualities
of 2-cycle mixing oils reducing
engine life and/or causing engine
 Generic mixing oil and marine
engine oil may not be intended
for use in high-performance 2cycle engines and should never
be used in Shindaiwa engines.
Mixing oils not intended for use in
high-performance air-cooled 2-cycle engines can cause excessive
carbon deposits, reduce engine
life and/or cause engine failure.
Bar Oil / Filling With Oil
Oil Requirements
 When available, use Shindaiwa Premium bar and chain oil.
 When Shindaiwa oil is not available,
use a premium 30-weight oil specifically blended for bar and chain
 For cold weather operation, bar oil
may be thinned by mixing with clean
kerosene at a ratio of 1:1.
Filling the Oil Reservoir
 Place the saw on its side (clutch
cover down), and wipe any chips or
debris from around the oil cap.
 Remove the oil cap at the front of the
 Fill the oil reservoir with bar and
chain oil and replace the cap.
 Wipe spilled oil from handles and
controls before starting the saw.
Proper lubrication is critical to the
performance and service life of your
saw’s oil pump, guide bar, and saw
chain! Always use a high quality
lubricating oil designed for saw
chain lubrication! Never use dirty or
reclaimed oil!
2. Place the saw on its side, with the
clutch cover facing up.
to Increase Oil Flow
Oil Pump Adjustment
Guide bar and saw chain lubrication
is automatically provided by an adjustable-rate oil pump designed to operate
whenever the clutch drum rotates. A
temporary increase in oil flow rate is
often desirable when cutting hardwoods
or large-diameter softwoods, and can be
provided as follows:
1. Stop the engine and verify that the
engine stop switch is in the “OFF”
3. Use a screwdriver to push down and
turn the oil flow rate adjustment
 Clockwise to decrease bar and chain
 Counter-clockwise to increase bar
and chain lubrication.
Starting the Engine
This chain saw is equipped
with a fast idle feature
for ease of engine starting. When
the fast idle is set, the saw chain
will rotate when the engine starts!
Rotating saw chain can cause
serious injury. Clear a safe work
area before starting the engine.
This engine ignition system is controlled
by a two-position “ON-OFF” switch labeled
“I” for ON and “O” for OFF located near
the rear handle.
This chain saw is equipped with a throttle trigger lock out system designed to
prevent unintended throttle activation.
This system requires the operator to
first depress the throttle lock out lever
on top of the rear handle to release the
trigger from the engine idle position.
The recoil starter can be
damaged by abuse!
4. Place the saw upright on the ground.
5. Secure the saw by stepping on the
inside of the rear handle with the
right foot and firmly grasping the
front handle with the left hand.
6. Grip the starter handle with the right
hand and pull slowly until starter
engagement is felt.
7. With the starter engaged, pull the
starter upward. Repeat until the engine either attempts to start or starts.
Firm Grip
 Never pull the starter completely
to the end of the starter cord.
Fully extending the starter cord
can damage the starter spring,
cord and/or starter assembly.
 Never release the starter grip
with the starter rope extended.
Always hold on to the grip during
engine start and return the starter
grip back to the starter housing slowly as the starter spring
retracts the rope.
If the engine fails to start, repeat the
starting procedure setting the choke
control appropriately for either a cold
or warm engine. If the engine still fails
to start, refer to the section, “Starting a
Flooded Engine.”
Engine Start:
1. Move the ignition ON-OFF switch to
the ON position.
2. COLD ENGINE ONLY: Completely
close the choke by pulling the choke
control out to the fully extended position. This motion will automatically
engage the “fast idle” setting.
3. WARM ENGINE: Pull the choke
control out to its fully extended position and then push the choke control
all the way in again. This motion will
automatically engage the “fast idle”
Place Foot in
Rear Handle
8. When the engine attempts to start or
starts, push the choke control in if
previously set. If the engine does not
continue to run, pull the starter until
the engine restarts then immediately
press and release the throttle lever to
disengage the fast idle.
Starting a Flooded Engine
If the carburetor choke is closed (choke
control fully extended) and after repeated attempts, the engine fails to start,
the engine may be flooded with fuel.
The following steps are recommended
to clear a flooded engine.
1. Move the “ON-OFF” ignition control
switch to the “OFF” position.
The ignition switch must
be in the “OFF” position to
prevent the chance of igniting fuel
and/or fuel vapors escaping from the
engine during this procedure.
2. Push the choke control completely in
to open the choke.
3. Remove the spark plug access cover
and disconnect the plug wire. Remove the spark plug.
Remove the
Spark Plug
Keep clear of the spark
plug opening! Any excess
fuel in the engine will be ejected
through the spark plug opening during starter operation.
Pull the engine over
5. With the spark plug removed, the
choke control pushed in and the
ignition control in the “OFF” position,
clear any excess fuel in the engine
by repeatedly pulling the starter until
no evidence of fuel is seen escaping
from the spark plug opening.
6. Replace the spark plug and install the
spark plug lead and access cover.
7. Refer to the Engine Start and Stop
section and follow the instructions for
starting a warm engine.
8. If the engine still fails to start, refer to
the Troubleshooting section.
4. Inspect the spark plug for damage or
excessive wear and replace if necessary. If the spark plug electrode is
fuel soaked, or coated with carbon
deposits, clean and set the plug gap.
Refer to page 14 of this manual in the
Maintenance section for spark plug
Stopping the Engine
1. Move the “ON-OFF” ignition control
switch to the off position. If the saw
has just been used, allow the engine
to idle for 1 to 2 minutes to stabilize
engine operating temperature before
stopping the engine.
Carburetor Adjustments
The saw chain must never
rotate at engine idle speed.
Idle Adjust
(Clockwise to Increase)
 Never run the engine at full
throttle with no-load. This may
cause engine seizure.
Idle Speed Adjustment:
Use a screwdriver to slowly turn the
idle speed adjusting screw clockwise or
counter-clockwise until the engine idles
at 2,800 min-1.
 Never operate this saw above
13,500 min-1. This may cause
engine seizure.
Low speed mixture and high speed
mixture for the 446s saw are factory set
and can not be adjusted in the field.
Chain Brake
Chain Brake Operation
This saw is equipped with a dual function chain brake designed to stop the
saw chain from rotating whenever
kickback occurs.
The chain brake is
installed only to reduce
the risk from kickback! The chain
brake is not a substitute for careful
The chain brake system for this unit
type 446s is not adjustable! If the chain
brake fails to stop the chain in any of
the following steps, DO NOT USE THE
SAW! Return the saw to your dealer for
 Engaging the brake lever causes a
brake band to tighten around the
clutch drum, stopping the saw chain.
Release the throttle whenever the chain
brake is activated!
 The chain brake can also be activated
by pushing the brake lever forward
 The chain brake is designed to
engage whenever the brake lever
strikes the operator’s hand or from
the inertial effects of kickback.
To release (disengage) the chain brake,
pull the brake lever rearward, towards
the front handle until a positive stop is
Chain Brake Testing
Step 1
Both of the following testing
procedures must cause the
chain brake to engage and prevent
the saw chain from moving! If the
chain brake does not fully engage
and prevent the saw chain from
moving during either test, DO NOT
saw to your dealer for repairs!
Step 1: Inertia Chain Brake
Function (engine “OFF”)
Use the following procedure to test for
proper operation:
1. Turn the engine “OFF,” and verify
that the ignition switch is in the “O”
or “OFF” position.
Step 2: Manual Chain Brake
Function (engine running)
Use the following procedure to test for
proper operation:
2. Hold the chain saw normally, gripping the rear handle with the right
1. Start the saw and warm the engine to
hand and the front handle with the
operating temperature.
left hand. While keeping the chain
2. With the saw on a flat stable surface,
saw level, hold the nose of the guide
maintain a firm grip on the rear hanbar approximately 35 cm above a solid
dle with the right hand and the top of
wood block. Release the front handle
the front handle with the left hand.
only and allow the guide bar nose to
The left hand should be centered with
drop onto the wood. The chain brake
the front hand guard.
lever should move forward to position 2 and activate the brake as soon
as the nose strikes the wood block.
Wearing gloves, make sure that the
saw chain cannot be pulled around
the guide bar.
Operating the saw at wide open
throttle for longer than 5 seconds
without a load could result in engine
3. Accelerate engine to full throttle,
then, without releasing the front handle, roll the left wrist forward against
the front hand guard/chain brake
lever to push the brake lever forward until the chain brake activates
(position 2). The saw chain must stop
immediately. If either of step 1 or
step 2 tests fail, contact an authorized
Shindaiwa dealer for repairs.
Step 2
1 Chain Can Move
2 Chain
Chain Brake Maintenance
Never start or operate this saw while
the chain brake is activated!
 Periodically clean the brake
mechanism of sawdust or debris.
 If the chain brake becomes damaged
or worn, or fails to completely engage
or release the clutch drum, return the
saw to your dealer for repairs.
 Never carry the saw by the brake
lever! Carry the saw by the front
 Always stop the saw and disengage
the chain brake before removing or
replacing the clutch cover!
 Never make carburetor adjustments
while the chain brake is engaged!
Cutting with the Saw
Always use full throttle while cutting!
Keep the chain sharp and let the saw
do the work! Forcing the saw into the
wood reduces cutting performance,
and can damage the saw through
Wear close-fitting clothing
to protect your legs and
arms. Do not wear clothing
or jewelry that could get
caught in the machinery
or brush.
Stop the saw before moving it to or
from the work area.
Wear hearing protection and eye protection
such as a face shield or goggles when
operating the unit to shield against saw dust.
Always wear gloves when
operating this saw.
Use full-throttle while
cutting and apply only enough
bar pressure to maintain engine
speeds of 9,000-10,000 min-1.
Clear a safe work area
before cutting.
Always wear leg protection (Chaps)
made of a cut-resistant material such as
ballistic nylon covering the full length of
the thigh to the top of the boot.
NEVER operate with a
loose saw chain!
NEVER operate the saw if
non-skid footwear. fastenings are loose or missing!
NEVER operate the saw if any
component parts are damaged,
Keep a proper footing
loose, or missing!
(do not overreach)!
Felling Trees
Before Felling a Tree
1. Determine the direction of fall by
 Tree shape and angle of lean.
 Size and shape/placement of limbs.
Direction of Fall
Of Fall
 Location of nearby trees or other
 Condition of tree (damage, disease,
 Prevailing wind direction.
2. Clear a safe work area around the
tree. Be alert for loose or dead limbs
overhead. Clear an appropriate
escape path approximately 45° from
the direction of fall.
3. Notify nearby workers of your
Diseased, damaged, or
otherwise unbalanced
trees can fall unpredictably during felling, and should be left to an
experienced timber faller!
Felling Small Trees
(Under 15 cm diameter)
1. Determine the direction of fall. If uncertain as to the direction of fall, use
the procedure “Felling Large Trees”
as outlined in the next section.
2. Engage the bumper spike against the
trunk of the tree and start to cut on
the side of the tree away from the fall.
Make a single cut all the way through
the tree.
3. When the tree begins to fall, stop the
saw, and put it down on the ground.
4. Use your retreat path to exit the area
Felling Trees (continued)
Felling Larger Trees
(Over 15 cm diameter)
Direction of
 If a tree is otherwise healthy and not
seriously out of balance, its direction
of fall can often be encouraged by
first “notching” the tree on the side
facing the desired direction of fall.
Failure to leave a proper
wooden hinge during the
falling or “back cut” can cause the
tree to pinch the saw’s guide bar
and may also change the direction
of fall!
Always make your falling
cut parallel to the bottom
cut! An angled falling cut may cause
the tree to split, possibly changing
the direction of fall!
Of Fall
 After the notch is completed, start
the felling cut slightly higher and on
the opposite side of the tree, away
from the direction of fall.
 The goal of the method is to leave a
sturdy wooden “hinge” for the tree to
pivot on while falling.
If the cut appears to be closing on the bar,
use a mallet to drive one or two plastic or
wooden wedges into the cut behind the
5. When the tree begins to fall, stop the
saw, and put it down on the ground.
6. Use your retreat path to exit the area
Limbing a standing tree is usually
accomplished in the same manner as
bucking, with a third and final cut used
to remove the remaining stub of the
1. Determine the direction of fall.
2. On the side of the tree facing the
direction of fall, make a single 90°
cut through approximately 1/3 of the
tree’s diameter.
3. Working from the same side of the
tree and at a 45° angle to the first cut,
make your second cut in an upward
direction to remove a notch from the
tree as shown.
4. Working on the opposite side of the
tree and starting approximately 2”
higher than the bottom of the notch
created in steps 1-3. Set the bumper
spike just behind the felling hinge.
Use full throttle and bring the bar
and chain slowly into the tree. Make
sure the tree does not start to move
in the opposite direction to your
intended felling direction. Drive a
wedge or breaker bar into the cut as
soon as it is deep enough.
Kickback danger increases
in over-height or out of
position cutting! Do not overreach
or attempt to cut above shoulder
When cutting unsupported logs or limbs,
starting with an underbuck cut will minimize the possibility of the wood splitting
during the bucking cut.
Always cut downed timber
from the uphill side of the
wood! Be alert for potential injury
from rolling or shifting logs! Downed
timber may shift or roll unpredictably
during cutting or handling operations!
 If the log is well supported, start your
cut from the top of the log. Keeping
the guide bar parallel to the ground,
cut straight down but do not allow the
saw to cut into the ground.
 Cutting downed timber, or “bucking,”
increases the possibility of the wood
settling and pinching the guide bar.
Driving one or more soft plastic or
wooden bucking wedges can help
prevent bar-pinching during a cut.
 Use two cuts when bucking near the
inboard end of an unsupported log.
1. Make the first cut as an overbuck
approximately 1/3 the diameter of
the log.
Second Cut (overbuck)
2. Finish the job with an underbuck
coming up from beneath and joining
the first cut.
First Cut
First Cut (underbuck)
About 1/3 of Tree Diameter
Second Cut
 Use two cuts when bucking the
outboard end of an unsupported
log. Your first cut should be an
underbuck, cutting upward through
approximately 1/3 the diameter of
the tree. Finally, move to the top of
the log and finish the cut by bucking
down (overbucking) to your first cut.
Before performing any
maintenance on this saw,
stop the engine and disconnect
the spark plug wire!
4. Sharpen and adjust the saw chains as
5. Clean the guide bar groove and oil
hole, and inspect the bar groove
and tip for damage or unusual wear.
Repair or replace worn or damaged
components as necessary.
Daily Maintenance
1. Remove dirt and debris from the saw
exterior, cylinder fins, and cooling air
2. Inspect the saw for fuel and oil leaks.
Repair as necessary.
3. Service the air filter.
 Remove the air filter cover and then
remove the element. Use extreme
care to prevent any debris from
entering the carburetor bore. Wash
all parts with soap and water, and
then gently wipe or blow dry before
6. Inspect the drive sprocket.
Filter Element
 Install the air filter element in the
10/15 Hour Maintenance
1. Remove and clean the spark plug.
Adjust the spark plug gap to 0.6 mm,
and reinstall.
0.6 mm
Replace any
damaged or
visibly worn
plug with an
or equivalent
spark plug of
the same heat
7. Inspect the entire saw for damaged,
loose or missing components or
fastenings. Repair as necessary.
Never allow chips or other debris
to enter the cylinder bore! Before
removing the spark plug, thoroughly clean the spark plug and
cylinder head area!
2. Remove the guide bar and chain.
Carefully inspect the drive sprocket
for wear or damage, and replace if
noted. Inspect the guide bar grooves
and tip for wear or damage, and
repair or replace components as
The drive sprocket and saw chain
loop should always be replaced as a
set! For economy, rotate the same 2-3
chains daily. When these chains are
worn out, replace both the chains and
drive sprocket at the same time.
40/50 Hour Maintenance
1. Replace the spark plug with an NGK
BPMR7A (or equivalent), gapped to
0.6 mm.
2. Use a hooked wire to extract the fuel
filter from inside the fuel tank, and
then remove and replace the filter
element. Before replacing the filter,
inspect the condition of the fuel line.
If damage or deterioration are noted,
the saw must be removed from
service until it can be inspected by a
Shindaiwa-trained service technician.
Fuel Line
Make sure you do not pierce the
fuel line with the end of the hooked
wire. The line is delicate and can be
damaged easily.
3. Extract the oil filter from inside the
oil tank, and then wash the filter
element in an approved solvent. If
damage or deterioration are noted
on the oil suction line, the saw must
be removed from service until it can
be inspected by a Shindaiwa-trained
service technician.
Long Term Storage
(over 30 days)
 Thoroughly clean the saw exterior.
Remove all chips and other debris
from the cylinder fins and cooling
 Drain the fuel tank, and then clear
the carburetor and lines by running
the saw until it stops from lack of
 Drain any remaining bar oil from the
oil reservoir.
Never store the saw with any fuel
remaining in the tank, fuel lines,
or carburetor! Your Shindaiwa
warranty does not include coverage
for damage caused by “stale” or
contaminated fuels!
 Remove, clean, and reinstall the air
filter element as described under
“Daily Maintenance.”
 Remove the spark plug, and then
pour 7.4 ml of 2-cycle mixing oil into
the cylinder through the spark plug
 Repair or replace any damaged
components as required, and then
store the unit in a clean, dry, dustfree area.
hole. Before reinstalling the spark
plug, slowly pull the recoil starter 2-3
times to distribute the oil over the
cylinder walls.
 Protect the chain by using a chain
Saw Chain Performance
Your saw’s performance on the job
depends heavily on the condition of its
saw chain.
How the Saw Chain Works
As the saw chain is pulled through the
Most of the actual cutting is done by
the sides and corners of the individual
Use a Filing Gauge
Sharpening Technique
1. The depth gauge setting determines
the depth of cut for each cutter.
1. Using the appropriate round file,
sharpen all cutters to a 35° angle as
2. The cutter’s leading edge enters the
wood, causing the entire cutter to
“rock back” and lift away from the
File all cutters to the same angle and
depth! Unequal filing may cause the
saw to vibrate or cut erratically!
Using a Depth gauge joiner
For consistent filing angles, use a filing
2. After all cutters are sharpened, use
a depth gauge joiner to measure the
height of each depth gauge.
Using a Flat File to Round the
Front Corner on a Depth Gauge
3. As required, use a flat file to lower
depth gauges to the appropriate
0.64 mm height.
4. After all depth gauges have been
adjusted, use a flat file to round each
depth gauge leading edge to original
curvature and angle.
3. The top plate peels the severed wood
chip away.
4. The chip is discharged out the rear of
the cutter.
Correct Filing Technique
Correct angle
on top plate
Slightly protruding
hook or point (curve
on non-chisel chain)
0.64 mm
Top of depth gauge at
correct height below
top plate
Front of depth
gauge rounded
Filing Problems
Top plate
angle less than
Hook in side
plate cutting
File held at less than
recommended angle.
Slow cutting. Requires
extra effort to cut.
File cutters to
recommended angle.
Top plate
angle more than
File held too low or the file
was too small.
Rough cutting. Chain grabs.
Cutters dull quickly or won’t
hold a cutting edge.
Check file size. File cutters to
recommended angle.
on side plate
cutting edge
File held at more than
recommended angle.
Cutting angle is very sharp
but will dull fast. Cutting
action rough and erratic.
File cutters to
recommended angle.
High depth
Depth gauge never filed.
Slow cutting. Must force
chain to cut. Will cause
excessive wear on the
cutter heel.
Lower gauges to
recommended setting.
File held too high or the file
was too large.
Cutters won’t feed into wood.
Slow cutting. Must force
chain to cut. Causes
excessive bottom wear.
File cutters at recommended
angle. Check file size.
Low depth
Wrong gauge setting
or no gauge used.
Rough cutting. Chain grabs.
Saw won’t pull chain through
wood. Excessive wear on the
cutter heel.
If depth gauges are too
low, the chain is no longer
Troubleshooting Guide
What To Check
Does the engine crank?
Possible Cause
Does the tank contain fresh fuel
of the proper grade?
Loose spark plug.
Tighten and re-test.
Excess wear on cylinder, piston, rings.
Consult with an authorized servicing dealer.
Fuel incorrect, stale, or contaminated;
mixture incorrect.
Refill with fresh, clean unleaded gasoline with a pump
octane of 87 or higher mixed with 50:1 Shindaiwa
Premium 2-cycle mixing oil or with an equivalent high
quality 2-cycle mixing oil.
Check for clogged fuel filter and/or vent.
Replace fuel filter or vent as required. Restart.
The ignition switch is in “O” (OFF) position.
Move switch to “I” (ON) position and restart.
Is there spark at the spark plug
wire terminal?
Check the spark plug.
Consult with an authorized servicing dealer.
Internal damage.
Is fuel visible and moving in the
return line when priming?
Faulty recoil starter.
Fluid in the crankcase.
Good compression?
Shorted ignition ground.
Faulty ignition unit.
Consult with an authorized servicing dealer.
If the plug is wet, excess fuel may
be in the cylinder.
Crank the engine with the plug removed, reinstall the
plug, and restart.
The plug is fouled or improperly gapped.
Clean and regap the plug to 0.6 mm. Restart.
The plug is damaged internally or
of the wrong size.
Replace the plug with a NGK BPMR7A. Restart
What To Check
Is the engine overheating?
Engine is rough at all speeds.
May also have black smoke and/
or unburned fuel at the exhaust.
Possible Cause
Operator is overworking the unit.
Cut at a slower rate.
Carburetor mixture is too lean.
Consult with an authorized servicing dealer.
Improper fuel ratio.
Refill with fresh, clean unleaded gasoline with a pump
octane of 87 or higher mixed with 50:1 Shindaiwa
Premium 2-cycle mixing oil or with an equivalent high
quality 2-cycle mixing oil.
Fan, fan cover, cylinder fins dirty or damaged.
Clean, repair or replace as necessary.
Carbon deposits on the piston or in the muffler.
Consult with an authorized servicing dealer.
Clogged air cleaner element.
Clean or replace the air filter.
Loose or damaged spark plug.
Tighten or replace the plug with a NGK BPMR7A.
Air leakage or clogged fuel line.
Repair or replace fuel filter and/or fuel line.
Water in the fuel.
Refill with fresh fuel/oil mixture.
Piston seizure.
Faulty carburetor and/or diaphragm.
Engine is knocking.
Consult with an authorized servicing dealer.
Overheating condition.
See above.
Improper fuel.
Check fuel octane rating; check for presence of
alcohol in the fuel. Refuel as necessary.
Carbon deposits in the combustion chamber.
Consult with an authorized servicing dealer.
Troubleshooting Guide (continued)
Poor acceleration.
Engine stops abruptly.
Engine difficult to shut off.
Chain rotates at idle speed.
Excessive vibration.
Possible Cause
Clogged air filter.
Clean or replace the air filter.
Clogged fuel filter.
Replace the fuel filter.
Chain brake engaged.
Inspect and/or test brake. Consult with an authorized
servicing dealer.
Lean fuel/air mixture.
Consult with an authorized servicing dealer.
Idle speed set too low.
Adjust: 2,800 RPM min-1.
Switch turned off.
Reset the switch and restart.
Fuel tank empty.
Refuel. See page 8.
Clogged fuel filter.
Replace fuel filter.
Water in the fuel.
Drain; replace with clean fuel. See page 8.
Shorted spark plug or loose terminal.
Clean or replace spark plug with a NGK BPMR7A,
Tighten the terminal.
Ignition failure.
Replace the ignition unit.
Piston seizure.
Consult with an authorized servicing dealer.
Ground (stop) wire is disconnected,
or switch is defective.
Test and replace as required.
Overheating due to incorrect spark plug.
Replace spark plug with a NGK BPMR7A.
Overheated engine
Idle engine until cool.
Engine idle too high.
Set idle: 2,800 RPM min-1.
Broken clutch spring or worn clutch spring boss.
Replace spring/shoes as required, check idle speed.
Warped or damaged sprocket, chain, or bar.
Inspect and replace chain components as required.
Bent crankshaft.
Consult with an authorized servicing dealer.
Declaration of Conformity
We hereby declare the Shindaiwa Engine Chain Saw,
Model E440 (446s/EC1).
meets the following respective requirements.
Council Directives:
89/336/EEC as amended
98/37/EC as amended
2000/14/EC as amended
2004/26/EC as amended
Standard taken:
EN 292 parts 1&2
EN 608 & ISO 11681-1
Measured sound power level: 112dB(A)
Guaranteed sound power level: 113dB(A)
Notified Body:
Lloyd’s Register, 71 Fenchurch Street, London EC3M 4BS UK
Storage No.: 0038/MCY/MUM/0510026/1
Technical documentation is kept by:
K. Maeda DIV. Manager
Engineering Research and Development DIV.
Shindaiwa Kogyo Co., Ltd.
Head office: 6-2-11, Ozuka—Nishi, Asaminami—Ku,
Hiroshima, 731—3167, Japan
TEL: 81-82-849-2003, FAX: 81-82-849-2482
6th May, 2005
T. Yoshitomi
DIV. Manager
Quality Assurance DIV.
Shindaiwa Kogyo Co., Ltd.
Head office: 6-2-11, Ozuka—Nishi, Asaminami—Ku,
Hiroshima, 731—3167, Japan
TEL: 81-82-849-2206, FAX: 81-82-849-2481
Shindaiwa Inc.
11975 S.W. Herman Rd.
Tualatin, Oregon 97062 USA
Telephone: 503 692-3070
503 692-6696
Shindaiwa Kogyo Co., Ltd.
Head Office:
6-2-11, Ozuka-Nishi
Asaminami-Ku, Hiroshima
731-3167, Japan
Telephone: 81-82-849-2220
©2005 Shindaiwa, Inc.
Part Number 69025-94310
Revision 3/05
Shindaiwa is a registered trademark
of Shindaiwa, Inc.
Specifications subject to change without notice.
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