Shindaiwa 446s Owner's manual

Read this manual and familiarize yourself with its contents.
This machine is designed for cutting wood and timber. Use only for designated purpose.
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.
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WARNING!
SHINDAIWA OWNER’S/OPERATOR’S MANUAL
446s CHAIN SAW
Part Number 69028-94310 Rev. 10/05
English ..........................1
Español................... SP_1
Francais..................FR_1

2
PAGE
Contents PAGE PAGE
Introductions
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.
Attention Statements ........................... 2
Safety Labels......................................... 5
Unit Description................................... 6
Specifications........................................ 6
Installing and Adjusting the
Guide Bar and Saw Chain ................... 7
Serial #
Model #
XXXXXXX
Shindaiwa Kogyo Co ., Ltd .
Hiroshima, Japan/Japon
IMPORTANT!
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.
Mixing 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 Guide ..................... 17
Emission System Warranty............... 19
IMPORTANT ENGINE INFORMATION
Shindaiwa, Inc.
DISPLACEMENT: 44.6 cc ECS: EM
ENGINE FAMILY: 6sWX.045431
THIS ENGINE CONFORMS TO PH1 U.S.
EPAREGULATIONS FOR SMALLNONROAD
ENGINES.
REFER TOTHE OWNER’S MANUAL FOR
MAINTENACE SPECIFICATIONSAND
ADJUSTMENTS.
Attention Statements
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
ywheel, or if an improper tool is used to
hold the ywheel in order to remove the
clutch, structural damage to the ywheel
could occur and could subsequently
cause the ywheel to burst.)
Throughout this manual are special
“Attention Statements”.
CAUTION!
A statement preceded by the word
“CAUTION” contains information
that should be acted upon to prevent
mechanical damage.
WARNING!
A statement preceded by the
triangular attention symbol
and the word “WARNING” contains
information that should be acted
upon to prevent serious bodily injury.
NOTE:
A statement preceded by the word
“NOTE” contains information that is handy
to know and may make your job easier.
IMPORTANT!
A statement preceded by the word
“IMPORTANT” is one that possesses
special signicance.
IMPORTANT!
WARNING!
The engine exhaust from this prod-
uct contains chemicals known to the
State of California to cause cancer,
birth defects or other reproductive
harm.
WARNING! Chain saws can be
dangerous! Careless or improper
use can result in serious or fatal
injury to the operator or others.
Read and follow the Operator’s
Manual. Failure to do so could
result in serious injury.
Wear eye and hearing protection
at all times during the operation of
this unit.
Always hold the saw with
both hands.
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!
Never let the guide bar
tip come in contact with
any object.
Pinching the saw along the top
of the guide bar may force the
bar rapidly back toward the
operator. Pinching can occur
whenever wood closes in
around the moving chain.
Do not operate this tool if you are
tired, ill or under the inuence of
alcohol, drugs, or medicine.
6

3
Chain Saw Kickback Safety Devices
WARNING!
Kickback
can happen
lightning-fast!
Chain Brake
Your chain saw is equipped with a
chain brake that is designed to stop the
chain in the event of a kickback. The
chain brake reduces the risk of acci-
dents, but only you can prevent them.
nThe chain brake can be activated
manually by your left hand push-
ing against the hand guard or
automatically by the inertia release
mechanism, in the event of kickback,
stopping the saw chain.
Activating the chain brake tightens
a brake band around the chain drive
mechanism, stopping the chain rotation.
Cutting Equipment
1. Guide bar. The smaller the guide
bar tip radius the lower the chance
of kickback.
2. Low kick chain. Low kickback
chain is designed to reduce the
force of a kickback.
NOTE:
The function of the front hand guard is to
reduce the risk of the chain hitting your left
hand if you loose the grip of the front handle.
Either of the following reactions could
cause you to lose control of your saw
while cutting, possibly resulting in
serious injury!
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!
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:
Kickback Safety Precautions
nGrip 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.
nAccelerate the saw before the
chain contacts the work area, and
always maintain high engine speeds
throughout the cut.
nSudden surprise can contribute to ac-
cidents! With a basic understanding of
kickback, you can reduce or eliminate
the element of surprise.
nClear obstructions from the work
area before cutting. Remove any log,
branch, or other obstruction that
might contact the guide bar tip during
cutting operations.
nDo not overreach or attempt to cut
above shoulder height.
nFollow the manufacturer’s
instructions for sharpening and
maintenance of the saw chain.
nUse only the replacement bar and
chain combinations specified by the
manufacturer.
nNever stand directly over the saw
while cutting!
nUse low-kickback chain, chain
brakes, or special guide bars to
reduce the risk of kickback. Low
kickback chain is chain that has
met the kickback performance
requirements of ANSI B175.1-
2000 (American National Standard
for Power Tools-Gasoline
Powered Chain Saws-Safety
Requirements) when tested on
the representative sample of chain
saws below 3.8 c.i.d. specified in
ANSI B175.1-2000.
Faulty cutting equipment
or the wrong combination
of bar and saw chain increases
the risk of kickback! Only use
the bar and chain combinations
recommended on page 6.
WARNING!
Brake engagement and oper-
ation depend upon proper
chain brake condition! For chain
brake test procedures see page 11.
WARNING!

4
WARNING!
nNever 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.
nWear safety footwear, snug-fitting
clothing, protective gloves, and
eye, hearing, and head-protection
devices while working with this
chain saw.
nDo 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.
nNever allow young children or any
person unfamiliar with chain saws
to operate this saw!
nClear 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.
nWhen felling, keep at least 2 tree
lengths away from your fellow
workers.
nBefore starting the saw engine,
make sure nothing is touching the
saw chain.
nKeep all parts of your body away
from the saw chain whenever the
engine is running!
Additional Safety Precautions
nStop 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
body.
nStop the engine before setting the
chain saw down.
nInstall the appropriate guide-bar
chain cover before transporting
the saw.
nNever 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 judgement.
nNever operate a saw that is
damaged, improperly adjusted,
or not completely and securely
assembled.
nDo not use this saw if the saw
chain continues to move after the
throttle control trigger is released.
nUse only Shindaiwa-recommended
parts when repairing or servicing
this saw.
nUse 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!
nUse extreme caution when cutting
smaller brush and saplings! Small-
diameter material may catch in the
chain and be whipped toward you
or pull you off balance, causing
you to lose control of the saw!
nOperate the saw only in a well
ventilated area. Be aware of carbon
monoxide poisoning. Exhaust
gases and lubrication oil mist can
cause serious injury or death.
nKeep the saw handles dry, clean
and free of oil or fuel mixture.
nNever operate any saw while
in a tree unless you have been
specifically trained to do so!
nNever perform service or repairs to
this saw unless you are specifically
trained and equipped to do so!
nImproper 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.
nNever allow any part of your
body near the clutch cover of an
operating saw.
nNever 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.
nAlways maintain a firm footing
while operating this saw! Ladders
and other temporary platforms
can shift unexpectedly, and are not
recommended!
nDo not operate this or any other
chain saw with the muffler
removed.
nAll chain saw service, other
than items listed in the owner’s
maintenance instructions,
should be performed by trained
Shindaiwa chain saw service
personnel.
nProlonged exposure to excessive
noise is fatiguing and could lead
to impaired hearing. The use of
proper ear protection can reduce
this potential hazard.
NOTE:
These safety precautions are intended
primarily for consumers or occasional
users. When using this chain saw for
logging purposes, refer to: CFR Section
1910. 226 (5); 2.5.1 of the American
National Safety Standard; Requirements
for Pulpwood Logging ANSI 03.1-1978;
and any applicable state safety codes.

5
IMPORTANT!
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.
Safety Labels
Bar and Chain Oil Tank Fuel Tank Choke
T
Carburetor Adjustment
Idle Speed
6

6
Tools Included
n Spark plug/13 mm socket wrench
(Scrench)
WARNING!
Do not make unauthorized
modications to this saw,
guide bar, or chain!
IMPORTANT!
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.
Unit Description
IMPORTANT!
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
operation.
Using the accompanying illustrations as
a guide, familiarize yourself with your
machine and its various components.
Brake Lever
Hand Guard
Guide Bar
Chain
Bar and Chain
Oil Filler Cap
Front Handle
Starter Handle Fuel Cap Throttle
Trigger
Air Cleaner Cover
Ignition
Switch
Choke
Throttle
Lockout
Muffler
Bar Nuts
Clutch Cover
Rear Hand
Guard
Rear Handle
Chain Catcher
Spike
Understanding your machine helps
ensure top performance, long service
life, and safer operation.
Specications
Model Name.................................................................... 446s
Displacement ......................................................44.6 cm3
Bore X Stroke ................................................... 41.5 x 33 mm
Engine Type ....................................2-cycle, vertical cylinder,
Air-cooled
Cooling System ......................................................Forced Air
Carburetor .............................................................Diaphragm
Fuel............................................................... Gasoline 2-cycle
mixing oil mixture 50:1
Fuel Tank Capacity ......................................18.2 oz (540 ml)
Oil Tank Capacity...........................................9.1 oz (270 ml)
Recommended Bar Size................16” (40 cm), 18” (45 cm)
Recommended Bar Type........................Sprocket Nose Bar
Recommended
Chain Type......Oregon type 33SL, pitch 0.325”, gauge 0.050”
Number of Rim Tooth........................................................... 7
Specified Pitch of Drive Sprocket................................0.325”
Starting............................................................. Recoil Starter
Ignition........................................Electronic ignition system
Spark Plug...................................................... NGK BPMR7A
Power Transmission.............Automatic Centrifugal Clutch
Handle...............................................................Anti-vibration
Chain Lubrication................ Automatic adjustable flow rate
Weight (less bar/chain) ................................. 9.9 lb (4.5 kg)
WARNING!
Replacement chain for this
saw must meet applicable
ANSI B175.1 kickback performance
requirements and/or be designated
as “low kickback chain” per ANSI
B175.1.1-2000 standards.
*Specifications subject to change without notice.
RECOMMENDED BAR AND CHAIN COMBINATIONS
CHAIN TYPE:
PART #:
GUIDE BAR:
PART #:
Oregon®Oregon®
33SL (16”) 33SL (18”)
33SL0-66X 33SL0-72X
16” Pro-Lite 18” Pro-Lite
40085-16 38490-18

7
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.
Sprocket
Insert Chain Tensioner
Pin into the Hole
Saw Chain
WARNING!
Never operate this saw
without the clutch cover
installed.
WARNING!
The cutters on the saw
chain are very sharp!
Always wear gloves when handling.
IMPORTANT!
Proper chain adjustment is essential for
maximum performance, chain life, and
operator safety. Always inspect chain
tension before operating this saw!
Installing and Adjusting the Guide Bar and Saw Chain
NOTE:
For longest chain life, place new or
replacement chain loops in oil and soak
overnight before installation.
IMPORTANT!
The chain brake must be completely
disengaged before removing or
installing the clutch cover.
1. Use the socket wrench to remove the
clutch cover nut(s) in a counter-
clockwise rotation.
2. Remove the clutch cover.
3. Remove and discard the packing
spacer.
4. Place the guide bar over the guide bar
stud(s) and chain tensioner pin.
CAUTION!
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!
Guide Bar
Spacer (discard)
Nut
Studs
Clutch Cover
7. Place the saw on a flat surface and lift
the bar nose slightly.
8. To adjust chain tension:
nTurn the chain tension screw clock-
wise to tighten the chain.
nTurn the chain tension screw
counter-clockwise to loosen the
chain.
nWhile 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.
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
freely.
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!
WARNING!
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!
Chain Adjusting
Screw
Turn Clockwise to
Tighten the Chain
(extend the guide
bar) Check the gap between chain side
plates and the bar rail
1/8” Max.
(3 - 3.5 mm)

8
Mixing Fuel
WARNING!
Minimize the risk of re,
burns, and personal injury!
IMPORTANT!
Shindaiwa high-performance 2-cycle en-
gines 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 failure!
nSTOP engine before refueling.
nALWAYS allow the engine to cool
before refueling!
nALWAYS open the fuel cap slow-
ly to allow any pressure build-up
in the tank to release fuel vapor
slowly.
n Avoid overlling and wipe up all
spilled fuel. Move the engine at
least 10 feet (3 meters) from the
fueling point, storage area and
other readily ammable
materials before restarting!
nALWAYS inspect the unit for fuel
leaks before each use. During
each rell, make sure there are
no fuel leaks around the fuel cap
and/or tank. If a fuel leak is evi-
dent, stop using the unit immedi-
ately. Fuel leaks must be repaired
before using the unit.
n NEVER smoke or light any res
near the engine or fuel source!
n NEVER place any ammable
material near the engine mufer!
nNEVER operate the engine with-
out the mufer and spark arrester
in good working condition.
nALWAYS have re extinguishing-
tools available if you should need
them. Sparks can come from the
mufer, the bar and chain or other
sources. Help prevent forest res.
CAUTION!
nSome 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 failure.
nGeneric mixing oil and marine
engine oil may not be intended for
use in high-performance 2-cycle
engines and should never be used
in Shindaiwa engines. Mixing oils
not intended for use in high-perfor-
mance air-cooled 2-cycle engines
can cause excessive carbon
deposits, reduce engine life and/or
cause engine failure.
nUse only fresh, clean unleaded gaso-
line with a pump octane rating of 87
or higher.
nMix fuel with a 2-cycle mixing oil
designed for use in high-performance
2-cycle air-cooled engines.
Filling With Fuel
1. Place the saw on a hard surface with
the fuel cap up and wipe any chips or
debris from around the fuel cap.
2. Remove the fuel cap and fill the tank
with clean, fresh 2-cycle fuel mix.
Avoid overfilling and fuel spillage.
3. Wipe any spilled fuel and move the saw
at least 10 feet (3 meters) from the fuel-
ing point before starting the engine.
Oil Requirements
nWhen available, use Shindaiwa
Premium bar and chain oil.
nWhen Shindaiwa oil is not avail-
able, use a premium 30-weight oil
specifically blended for bar and
chain lubrication.
nFor cold weather operation, bar
oil may be thinned by mixing with
clean kerosene at a ratio of 1:1.
Filling the Oil Reservoir
1. Place the saw on its side (clutch
cover down), and wipe any chips or
debris from around the oil cap.
2. Remove the oil cap at the front of
the saw.
3. Fill the oil reservoir with bar and
chain oil and replace the cap.
4. Wipe spilled oil from handles and
controls before starting the saw.
Bar Oil
CAUTION!
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!
Oil Pump Adjustment
Guide bar and saw chain lubrication is
automatically provided by an adjust-
able-rate oil pump designed to operate
whenever the clutch drum rotates. A
temporary increase in oil flow rate is
often desirable when cutting hard-
woods 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”
position.
Counter-Clockwise
to Increase Oil Flow
3. Use a screwdriver to turn the oil
flow rate adjustment screw.
nClockwise to decrease lubrication.
nCounter-clockwise to increase
lubrication.
2. Place the saw on its side, with the
clutch cover facing up.
GASOLINE 2-CYCLE MIXING OIL
U.S. Gallons U.S. Fluid Ounces
1 gal................................................2.6 oz
2.5 gal.............................................6.4 oz
5 gal..............................................12.8 oz
Liters Milliliters
2.5 l.................................................50 ml
5 l..................................................100 ml
10 l.................................................200 ml
20 l................................................400 ml
Example of 50:1 Mixing Quantities

9
Starting the Engine
Firm Grip
Place Foot in
Rear Handle
CAUTION!
The recoil starter can be
damaged by abuse!
nNever 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.
nNever 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 hous-
ing slowly as the starter spring
retracts the rope.
NOTE:
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.”
WARNING!
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.
NOTE:
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.
Pull
to Choke
ON
STOP
Switch
IMPORTANT!
This chain saw is equipped with a throt-
tle trigger lock out system designed to
prevent unintended throttle activation.
This system requires the operator to
rst depress the throttle lock out lever
on top of the rear handle to release the
trigger from the engine idle position.
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 posi-
tion. This motion will automatically
engage the “fast idle” setting.
3. WARM ENGINE: Pull the choke
control out to its fully extended posi-
tion and then push the choke control
all the way in again. This motion will
automatically engage the “fast idle”
setting.
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 en-
gine either attempts to start or starts.
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.

10
If the carburetor choke is closed (choke
control fully extended) and after re-
peated attempts, the engine fails to start,
the engine may be flooded with fuel.
The following steps are recommended
to clear a flooded engine.
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. Re-
move the spark plug.
4. Inspect the spark plug for damage or
excessive wear and replace if neces-
sary. 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
information.
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.
Starting a Flooded Engine
Pull the engine over
1. Move the “ON-OFF” ignition control
switch to the “OFF” position.
WARNING!
Remove the
Spark Plug
Idle Adjust
(Clockwise to Increase)
Carburetor Adjustments
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.
CAUTION!
nNever run the engine at full
throttle with no-load. This may
cause engine seizure.
nNever operate this saw above
13,500 min-1. This may cause
engine seizure.
NOTE:
Low speed mixture and high speed
mixture for the 446s saw are factory set
and can not be adjusted in the eld.
WARNING!
The saw chain must never
rotate at engine idle speed.
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.
WARNING!
Keep clear of the spark
plug opening! Any excess
fuel in the engine will be ejected
through the spark plug opening dur-
ing starter operation.
Stopping the Engine