Shindaiwa 285s Owner's manual

OWNER’S/OPERATOR’S MANUAL
285s CHAIN SAW
352s CHAIN SAW
WARNING!
Minimize the risk of injury to yourself and others!
Read this manual and familiarize yourself with the
contents. Always wear eye and hearing protection
when operating this unit.
Part Number 69018-94312 Rev. 10/07

2
Attention Statements
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.
Do not operate this tool if you are
tired, ill or under the inuence of
alcohol, drugs, or medicine.
Beware of Kickback!
Kickback can occur whenever
the tip of the guide bar touches
an object while the saw is operat-
ing. Kickback may force the bar
up and back toward the operator
with a lightning-fast reaction!
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 mov-
ing chain.
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 subse-
quently 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 trian-
gular 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.
Introductions
The Shindaiwa 285s and 352s chain
saws are designed and built to deliver
superior performance and reliability
without compromise to quality, comfort,
safety, or durability. Shindaiwa high per-
formance engines represent the leading
edge of 2-cycle engine technology, and
deliver exceptionally high power at re-
markably low displacement and weight.
As a professional owner/operator, you’ll
soon discover why Shindaiwa is simply
in a class by itself.
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
285s and 352s 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.
PAGE
Contents
Attention Statements ........................... 2
Safety Information................................ 3
Unit Description................................... 6
Specifications........................................ 6
Installing Guide Bar and Adjusting
Chain ..................................................... 7
Mixing/Filling Fuel ............................. 8
Bar Oil................................................... 9
Starting the Engine............................ 10
Stopping the Engine .......................... 10
Starting a Flooded Engine ................ 11
Carburetor Adjustments.................... 12
Chain Brake........................................ 13
Cutting with the Saw.......................... 14
Felling Trees ...................................... 14
Bucking/Limbing .............................. 15
Maintenance....................................... 16
Saw Chain Performance.................... 18
Troubleshooting................................. 19
Emission System Warranty............... 22
IMPORTANT!
WARNING!
The engine exhaust from this
unit contains chemicals known to the
State of California to cause cancer,
birth defects or other reproductive
harm.

3
Kickback Safety
WARNING!
Kickback can
happen light-
ning-fast!
This saw is equipped with the following
safety equipment:
1. Inertia chain brake.
2. Low kick chain.
 Activating the chain brake tightens
a brake band around the chain drive
mechanism, stopping all chain rota-
tion. When sudden kickback occurs,
the chain break is automatically
actuated and the chain stops instantly.
The chain brake can also be activated
manually.
 Low-kick chain can significantly re-
duce the rotational force of kickback.
 Some bars are manufactured with a
reduced-radius (smaller) nose. This
special guide bar can reduce kick-
back by placing fewer cutters in the
kick-back zone.
WARNING!
To reduce the risk of kickback, all of
the above devices must be properly
installed and in good repair! Use
of other than ANSI B175.1- 2000
combinations may result in reduced
kickback protection!
WARNING!
Brake engagement and operation
depend upon proper chain break
condition! For proper chain brake
testing and adjustment proce-
dures, see page 13.
WARNING!
Either of the following reactions could
cause you to lose control of your saw
while cutting, possibly resulting in seri-
ous 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 op-
erator 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 opera-
tor! 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 fol-
lowing steps will also help you to avoid
accident or injury on the job:
Kickback Safety Precautions
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.
Accelerate the saw before the chain
contacts the work area, and always
maintain high engine speeds through-
out the cut.
Sudden surprise can contribute to ac-
cidents! With a basic understanding of
kickback, you can reduce or eliminate
the element of surprise.
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.
Do not overreach or attempt to cut
above shoulder height.
Follow the manufacturer’s instruc-
tions for sharpening and mainte-
nance of the saw chain.
Use only the replacement bar and
chain combinations specified by the
manufacturer.
Never stand directly over the saw
while cutting!
Use low-kickback chain, chain
brakes, or special guide bars to re-
duce the risk of kickback. Low kick-
back 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.

4
WARNING!
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. 266 (5); 2.5.1 of the
American National Safety Standard;
Requirements for Pulpwood Logging
ANSI 03.1-1978; and any applicable
state safety codes.
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.
Wear safety footwear, snug-fitting
clothing, protective gloves, and
eye, hearing, and head-protection
devices while working with this
chain saw.
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.
Additional Safety Precautions
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
body.
Stop the engine before setting the
chain saw down.
Install the appropriate guide-bar
scabbard before transporting the
saw.
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 judgement.
Never operate a saw that is dam-
aged, improperly adjusted, or not
completely and securely assem-
bled.
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 sud-
denly, causing you to lose control
of the saw!
Use 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!
Operate the saw only in a well venti-
lated area.
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 specifi-
cally 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 com-
ponents, 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.
Always maintain a firm footing while
operating this saw! Ladders and
other temporary platforms can shift
unexpectedly, and are not recom-
mended!

5
WARNING!
Read and follow all safety precautions in the
owner's manual. Failure to follow instructions
could result in serious personal injury.
For replacement, use Shindaiwa
®
brand 14" or 16"
Guard Tip bar with Oregon
®
91VG chain. Other
low-kick combinations may be available.
GASOLINE POWERED CHAIN SAWS
LISTED IN ACCORDANCE WITH
AMERICAN NATIONAL STANDARD
SAFETY SPECIFICATIONS FOR
GASOLINE POWERED CHAIN SAWS
(ANSI B175.1-2000)
WARNING!
LISTED
12R7
¡IMPORTANTE!
285s
352s
IMPORTANT!
Safety and Operation Information
Labels: Make sure all information
labels are undamaged and read-
able. Immediately replace damaged
or missing information labels. New
labels are available from your local
authorized Shindaiwa dealer.
Safety Labels

6
Specications*
Model. ........................................................................................................................... 285s 352s
Displacement................................................................................................................ 28.5cc (1.74 cu.in.) 35.2cc (2.15 cu.in.)
Engine Type ....................................................2-cycle gas engine, vertical cylinder X X
Cooling System ..........................................................................................Forced air X X
Carburetor ....................................................................................................... Walbro WT 702 WT 701
Fuel........................Gasoline-oil mixture, 50:1 with Shindaiwa 2-Cycle Engine Oil X X
Starting.................................................................................. Soft Start recoil starter X X
Stopping ............................................................................................... Toggle switch X X
Ignition.............................................................................Electronic ignition system X X
Spark Plug...........................................................................................NGK BPMR7A X X
Power Transmission................................................... Automatic centrifugal clutch X X
Handle..............Special anti-vibration mountings on both front and rear handles X X
Safety Devices .................................................Front hand guard, rear hand guard, X X
throttle lock, chain brake and chain catcher
Chain Lubrication.........................Automatic (clutch driven) fully adjustable oiler X X
Chain Oil.............................Shindaiwa Premium Bar & Chain Oil (or equivalent) X X
Fuel Tank Capacity ...................................................................................................... 340ml (11.5 oz.) 400ml (13.5 oz.)
Oil Tank Capacity......................................................................................................... 250ml (8.5 oz.) 250ml (8.5 oz.)
Weight (less bar & chain) ........................................................................................... 4.2 kg (9.2 lbs.) 4.2 kg (9.2 lbs.)
*Specifications subject to change without notice.
Tools Included
Screwdriver (352s only)
Spark plug/13mm socket wrench
(Scrench)
WARNING!
Do not make unauthorized modica-
tions 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 manu-
al, 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
Brake Lever
Hand Guard
Guide Bar
Saw Chain
Bar and Chain
Oil Filler Cap
Front Handle
Starter Handle Fuel Filler Cap Throttle Trigger
Air Cleaner Cover
Ignition Switch
Muffler
Bar Nut(s)
Clutch Cover
Rear Hand
Guard
Choke/Fast Idle
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
of this product.
Throttle Lockout

7
RECOMMENDED BAR AND CHAIN COMBINATIONS
285s: Chain Type 91VG (12”) 91VG (14”)
Guide Bar 12” Double-Guard 14” Double-Guard
Sprocket Nose Bar Sprocket Nose Bar
352s: Chain Type 91VG (14”) 91VG (16”)
Guide Bar 14” Double-Guard 16” Double-Guard
Sprocket Nose Bar Sprocket Nose Bar
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 B175.1-2000
standards.
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 on
the next page.
6. Install the clutch cover over the bar
stud(s) and install the the bar nut(s)
finger tight. Continued on next page.
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 replace-
ment chain loops in oil and soak overnight
before installation.
IMPORTANT!
The chain brake must be completely
disengaged before removing or install-
ing the clutch cover.
1. Use the socket wrench to remove the
clutch cover nut(s) in a counter-clock-
wise 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 seri-
ous damage to the clutch cover,
guide bar, tensioner pin, and/or
engine crankcase!
Guide Bar
Spacer (discard)
Nut
Studs
Clutch Cover

8
3. Refer to following examples of 50:1
fuel to oil mix quantities.
Mixing Fuel/Filling With Fuel
WARNING!
Minimize the risk of re, burns, and
personal injury!
IMPORTANT!
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
failure!
STOP engine before refueling.
ALWAYS allow the engine to cool
before refueling!
ALWAYS open the fuel cap slow-
ly to allow any pressure build-up
in the tank to release fuel vapor
slowly.
 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 materi-
als before restarting!
ALWAYS 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 evident, stop using the unit
immediately. Fuel leaks must be
repaired before using the unit.
 NEVER smoke or light any res
near the engine or fuel source!
 NEVER place any ammable
material near the engine mufer!
NEVERoperatethe enginewithout
the mufer and spark arrester in
goodworking condition.
CAUTION!
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 failure.
 Generic 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-performance air-cooled 2-cy-
cle engines can cause excessive
carbon deposits, reduce engine
life and/or cause engine failure.
1. Use only fresh, clean unleaded gaso-
line 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.
NOTE:
Shindaiwa offers two performance levels
of 2-cycle air-cooled mixing oils, Shindaiwa
2-Cycle mixing Oil and Shindaiwa ONE
High Performance 2-Cycle Mixing Oil.
Shindaiwa 2-Cycle Mixing Oil is designed
to meet the lubrication demands of most
2-cycle air-cooled engines. Shindaiwa ONE
High Performance 2-Cycle Mixing Oil is
recommended when superior lubrication
is needed to help protect engines used in
severe operating conditions. Shindaiwa
ONE also contains a fuel stabilizer to help
maintain fuel quality when fuel is stored
longer than 30 days.
7. Place the saw on a flat surface and lift
the bar nose slightly.
8. To adjust chain tension:
 Turn the chain tension screw clock-
wise to tighten the chain.
 Turn the chain tension screw counter-
clockwise to loosen the chain.
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.
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.
WARNING!
Inspect chain tension often during
operation, especially when breaking
in a new chain. A loose saw chain
can jump from the guide bar, pos-
sibly 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.
Installing and Adjusting the Guide Bar and Saw Chain (cont.)
4. Place the saw on a hard surface with
the fuel cap up and wipe any chips or
debris from around the fuel cap.
5. Remove the fuel cap and fill the tank
with clean, fresh 2-cycle fuel mix.
Avoid overfilling and fuel spillage.
6. Wipe any spilled fuel and move the
saw at least 10 feet (3 meters) from
the fueling point before starting the
engine.
Gasoline 2-cycle mixing oil
liters milliliters
2.5 l ................................50 ml
5 l ...................................100 ml
10 l .................................200 ml
20 l .................................400 ml
Gasoline 2-cycle mixing oil
U.S. Gal. U.S. . oz.
1gal...............................2.6 oz.
2 gal. ..............................5.2 oz.
2.5 gal. ...........................6.4 oz.
5 gal. ..............................12.8 oz.
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 approx. 1-turn each, and then
perform steps 7-9 above. Never oper-
ate the saw with a loose chain!

9
Oil Requirements
When available, use Shindaiwa
Premium bar & chain oil.
When Shindaiwa oil is not available,
use a premium 30-weight oil specifi-
cally blended for bar & chain lubrica-
tion.
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
saw.
Fill the oil reservoir with bar & chain
oil and replace the cap.
Wipe spilled oil from handles and
controls before starting the saw.
Bar Oil / Filling With 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 qual-
ity lubricating oil designed for saw
chain lubrication! Never use dirty or
reclaimed oil!
Oil Pump Adjustment
Guide bar and saw chain lubri-
cation is automatically provided
by an adjustable-rate oil pump
designed to operate whenever
the clutch drum rotates. A tem-
porary increase in oil ow 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”
position.
2. Place the saw on its side, with the
clutch cover facing up.
3. Use a screwdriver to turn the oil flow
rate adjustment screw.
Clockwise to decrease bar & chain
lubrication.
Counter-clockwise to increase bar &
chain lubrication.
Counter-Clockwise
to Increase Oil Flow

10
Firm Grip
Place Foot in
Rear Handle
CAUTION!
The recoil starter can be damaged
by abuse!
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.
NOTE:
If the engine fails to start, repeat the start-
ing 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 Stop:
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.
Engine Start and Stop
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.
IMPORTANT!
This chain saw is equipped with a
throttle trigger lock out system designed
to prevent unintended throttle activa-
tion. 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
Pull to Choke
Ignition Switch
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.
NOTE:
This engine ignition system is controlled
by a two-position “ON-OFF” switchlabeled
“I” for ON and “O” for OFF located near
the rear handle.
4. Place the saw upright on the ground.
5. Secure the saw by stepping on the in-
side 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.

11
If the carburetor choke is closed (choke
control fully extended) and after repeat-
ed attempts, the engine fails to start, the
engine may be flooded with fuel. The fol-
lowing 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. Remove
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 16 of this manual in the
maintenance section for spark plug
information.
WARNING!
Keep clear of the spark
plug opening! Any excess fuel in the
engine will be ejected through the
spark plug opening during starter
operation.
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
Remove the
Spark Plug
Pull the engine over
1. Move the “ON/OFF” ignition control
switch to the “OFF” position.
WARNING!

12
Low speed adjust-
ment screw
Carburetor Adjustments
IMPORTANT!
A clean and unrestricted air-ow is
essential to your saw engine’s perfor-
mance and durability! Before attempting
any carburetor adjustments, inspect
and clean the engine air lter as re-
quired! Procedures for maintaining your
saw’s air lter are described on page 16
in this manual.
Before starting the saw
I. Inspect saw chain tension, and adjust
if necessary. (See page 8.)
2. Verify that the chain brake is disen-
gaged, and that the saw chain is free
to rotate.
Start the saw
Start the saw and warm the engine to op-
erating temperature. With the chain saw
on a flat surface and the engine running,
adjust the carburetor using the following
procedures:
WARNING!
The saw chain must never rotate at
engine idle speed.
Low and High Mixture
Adjustments for Emission
Compliance Engines.
Idle Adjust
(Clockwise to Increase)
High speed adjust-
ment screw
WARNING!
The saw chain will move during the
carburetor adjustment. Make sure
that the guide bar and saw chain
can not contact any objects and that
bystanders and pets stay clear of
the chain saw while the carburetor is
being adjusted.
IMPORTANT!
This chain saw is equipped with an US
EPA tamper resistant carburetor. The
low (L) and high (H) speed adjustment
screws are limited to approximately 1/4
turn from stop to stop.
Low-speed (L) mixture screw
(engine idling at operating tem-
perature)
 With the engine running, slowly turn
the low speed (L) mixture screw
clockwise until it stops. Check engine
acceleration. Slowly turn the low
speed (L) mixture counterclockwise
until it stops (approx. 1/4 turn).
Check engine acceleration again.
Position the low speed (L) mixture
screw for best engine acceleration.
 If necessary, readjust the idle speed
screw for an engine idle speed of
2,800 - 3,200 rpm (min-1).
CAUTION!
Operating the saw at wide open
throttle for longer than 5 seconds
without a load could result in engine
damage.
Idle speed adjustment
Turning the idle speed adjusting screw
clockwise increases engine idle speed
while turning the adjusting screw
counterclockwise decreases idle speed.
Adjusted correctly, the engine should
run at a steady speed and the saw chain
should not move or attempt to move.
Using an engine tachometer, the recom-
mended idle speed is 2,800-3,200 rpm
(min-1). If a tachometer is not available,
decrease idle speed until the chain stops
moving.
If the engine idle can not be adjusted so
that the saw chain stops moving when
the throttle trigger is released, imme-
diately stop using the chain saw and
contact an authorized Shindaiwa dealer
for assistance.
High speed (H) mixture screw
 The high speed (H) adjusting screw
will vary the maximum engine speed
with the throttle trigger fully de-
pressed by approximately 500 rpm.
Turning the high speed (H) screw
clockwise will increase maximum en-
gine speed while turning high speed
(H) screw counterclockwise (approx.
1/4 turn) will decrease maximum
engine speed. For most conditions,
turning the (H) screw counterclock-
wise to its stop will provide the best
engine performance during operation.

13
Chain Brake Operation and Service
Chain Brake Operation
This saw is equipped with a dual func-
tion chain brake designed to stop the
saw chain from rotating whenever
kickback occurs.
WARNING!
The chain brake is installed only to
reduce the risk from kickback! The
chain brake is not a substitute for
careful operation!
IMPORTANT!
Release the throttle whenever the chain
brake is activated!
IMPORTANT!
The chain brake system for models 285s
and 352s 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
repairs.
WARNING!
 Periodically clean the brake mecha-
nism 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 le-
ver! Carry the saw by the front handle.
CAUTION!
Never start or operate this saw while
the chain brake is activated!
 Engaging the brake lever causes a
brake band to tighten around the
clutch drum, stopping the saw chain.
 The chain brake is designed to
engage whenever the brake lever
strikes the operator’s hand or from
the inertial effects of kickback.
 The chain brake can also be activated
by pushing the brake lever forward
manually.
To release (disengage) the chain brake,
pull the brake lever rearward, towards
the front handle until a positive stop is
felt. (Position 1).
Both of the above testing procedures must cause the chain brake to engage and prevent the saw chain from mov-
ing! If the chain brake does not fully engage and prevent the saw chain from moving during either test, DO NOT
OPERATE THE SAW! Return the saw to your dealer for repairs!
 Always stop the saw and disengage
the chain brake before removing or
replacing the clutch cover!
Chain Brake Maintenance
Step 2: Manual Chain Brake
Function (engine running)
Use the following procedure to
test for proper operation:
1. Start the saw and warm the engine to
operating temperature.
2. With the saw on a flat stable surface,
maintain a firm grip on the rear
handle with the right hand and the
top of the front handle with the left
hand. The left hand should be cen-
tered with the front hand guard.
1
2Chain
Stopped
Chain Can Move
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.
2. Hold the chain saw normally gripping
the rear handle with the right hand
and the front handle with the left
hand. While keeping the chain saw
level, hold the nose of the guide bar
approximately 14 inches above a solid
wood block. Release the front handle
only and allow the guide bar nose to
drop onto the wood. The chain brake
lever should move forward to posi-
tion 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.
3. Accelerate engine to full throttle,
then, without releasing the front han-
dle, roll the left wrist forward against
the front hand guard/chain brake
lever to push the brake lever for-
ward 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.
CAUTION!
Operating the saw at wide open
throttle for longer than 5 seconds
without a load could result in engine
damage.
Chain Brake Testing
 Never make carburetor adjustments
while the chain brake is engaged!
Step 1
Step 2

14
Felling Trees Felling Small Trees
(Under 6” diameter)
1. Determine the direction of fall. If un-
certain as to direction of fall, use the
procedure “Felling Large Trees” as
outlined on the following page.
2. Start cutting on the side of the tree
away from the fall, and make a single
felling cut all the way through the
tree.
3. Stop the saw, and put it down on the
ground.
4. Use your retreat path to exit the area
quickly.
WARNING!
Diseased, damaged, or otherwise
unbalanced trees can fall unpredict-
ably during felling, and should be left
to an experienced timber faller!
Escape
Path
Direction of Fall
Cutting with the Saw
THINK SAFETY!
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 overheating!
Clear a safe work area
before cutting.
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.
Always wear gloves
when operating
this saw. Use full-throttle while
cutting and apply only enough
bar pressure to maintain
engine speeds of 9000-10,000
rpm (min-1).
Wear close-fitting clothing to
protect your legs and arms.
Do not wear clothing or jew-
elry that could get caught in
the machinery or brush.
Keep a proper footing
(do not overreach)!
Wear
appropriate
non-skid footwear.
Never operate with a loose
saw chain!
Never operate the saw if fas-
tenings are loose or missing!
Never operate the saw
if any component parts
are damaged, loose,
or missing!
IMPORTANT!
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.
2. Clear a safe work area around the tree.
Be alert for loose or dead limbs over-
head. Clear an appropriate escape path
approx. 45o from the direction of fall.
3. Notify nearby workers of your intentions!
Before Felling a Tree
1. Determine the direction of fall by
inspecting:
Tree shape and angle of lean.
Size and shape/placement of limbs.
Location of nearby trees or other
obstacles.
Condition of tree (damage, disease,
etc.).
Prevailing wind direction.

15
Limbing
Limbing a standing tree is usually ac-
complished in the same manner as buck-
ing, with a third and final cut used to
remove the remaining stub of the limb.
NOTE:
When cutting unsupported logs or limbs,
starting with an underbuck cut will mini-
mize the possibility of the wood splitting
during the bucking cut.
Felling Larger Trees
(Over 6” diameter)
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.
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.
1. Determine the direction of fall.
2. On the side of the tree facing the
direction of fall, make a single 90o
cut through approx. 1/3 of the tree’s
diameter.
3. Working from the same side of the
tree and at a 45oangle to the first cut,
make your second cut in an upward
direction to remove a notch from the
tree as shown.
WARNING!
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!
WARNING!
Always make your falling cut parallel
to the bottom cut! An angled falling
cut may cause the tree to split, pos-
sibly changing the direction of fall!
Notch
Hinge
Direction of
Fall
Felling
Cut
Felling Trees (cont.)
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, make the final
felling cut as shown.
NOTE:
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 bar.
5. Stop the saw, and put it down.
6. Use your retreat path to exit the area
quickly.
 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.
Bucking
Techniques
 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
approx. 1/3 the diameter of the log.
2. Finish the job with an underbuck
coming up from beneath and joining
the first cut.
WARNING!
Always cut downed timber from the
uphill side of the wood! Be alert for
potential injury from rolling or shift-
ing logs! Downed timber may shift or
roll unpredictably during cutting or
handling operations!
WARNING!
Kickback danger increases in over-
height or out of position cutting!
Do not overreach or attempt to cut
above shoulder height!
First Cut
Second Cut
First Cut (underbuck)
About 1/3 of Tree Diameter
Second Cut (overbuck)
3 2
1

16
10/15 Hour Maintenance
1. Remove and clean the spark plug.
Adjust the spark plug gap to 0.024”
(0.6mm), and reinstall. Replace any
damaged or visibly worn plug with
an NGK BPMR7A or equivalent
spark plug of the same heat range.
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
required.
IMPORTANT!
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.
CAUTION!
Never allow chips or other debris
to enter the cylinder bore! Before
removing the spark plug, thor-
oughly clean the spark plug and
cylinder head area!
.024”
(.6mm)
Maintenance
IMPORTANT!
MAINTENANCE, REPLACEMENT, OR
REPAIR OF EMISSION CONTROL
DEVICES AND SYSTEM MAY BE
PERFORMED BYANY REPAIR
ESTABLISHMENT OR INDIVIDUAL.
HOWEVER, WARRANTY REPAIRS
MUST BE PERFORMED BYA DEALER
OR SERVICE CENTERAUTHORIZED
BY SHINDAIWA KOGYO, LTD. AND
USE OF PARTS THATARE NOT
EQUIVALENT IN PERFORMANCE
AND DURABILITY TO AUTHORIZED
PARTS MAY IMPAIR THE
EFFECTIVENESS OF THE EMISSION
CONTROL SYSTEM AND MAY HAVE
A BEARING ON THE OUTCOME OF
THE WARRANTY CLAIM.
WARNING!
Before performing any mainte-
nance on this saw, stop the engine
and disconnect the spark plug wire!
Daily Maintenance
1. Remove dirt and debris from the saw
exterior, cylinder fins, and cooling air
intake.
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 enter-
ing the carburetor bore. Wash all
parts with soap and water, and then
gently wipe or blow dry before reas-
sembly.
 Install the air filter element in the saw.
IMPORTANT!
For cutting in dry weather, an optional
ocked air lter will offer additional
protection. However, when operating
in damp or icing conditions the ocked
lter should be replaced with a mesh-
type element.
4. Sharpen and adjust the saw chains as
required.
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.
6. Inspect the entire saw for damaged,
loose or missing components or fas-
tenings. Repair as necessary.
Cover
Filter Element
Pre-filter Element

17
40/50 Hour Maintenance
1. Replace the spark plug with an NGK
BPMR7A (or equivalent), gapped to
0.024” (0.6mm).
2. 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.
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.
Fuel Line
Fuel
Filter
Spark Arrester Maintenance
(over 30 days)
 Thoroughly clean the saw exterior.
Remove all chips and other debris
from the cylinder fins and cooling
passages.
 Drain the fuel tank, and then clear the
carburetor and lines by running the
saw until it stops from lack of fuel.
Hard starting or a gradual loss of perfor-
mance can be caused by carbon deposits
lodged in the muffler’s spark arrester
screen. For maximum performance, the
arrester screen should be periodically
removed and cleaned with a small wire
brush.
 The muffler used on Model 285s has
an internal baffle that can be re-
moved for cleaning by removing the
two nuts on the muffler cover.
 The muffler used on Model 352s is
a one piece assembly and cannot be
further disassembled for service.
CAUTION!
Never store the saw with any fuel
remaining in the tank, fuel lines, or
carburetor! Your Shindaiwa warranty
does not include coverage for dam-
age caused by “stale” or contami-
nated fuels!
 Drain any remaining bar oil from the
oil reservoir.
 Remove the spark plug, and then
pour 1/4-oz of 2-cycle mixing oil into
the cylinder through the spark plug
hole. Before reinstalling the spark
plug, slowly pull the recoil starter 2-3
times to distribute the oil over the
cylinder walls.
 Remove, clean, and reinstall the air fil-
ter element as described under “daily
maintenance.”
 Repair or replace any damaged com-
ponents as required, and then store
the unit in a clean, dry, dust-free area.
Mounting
Gasket
Cover Screw
Cover Arrester Screen
Muffler Body
Mounting Bolt
Long Term Storage
Mounting
Gasket
Cover Screw
Cover Arrester Screen
285s
Muffler Body
Nut
Cover
Baffle
Plate Stud
352s

18
Correct Filing Technique
Filing Problems
Top plate angle
less than recom-
mended
Backslope on
side plate cut-
ting edge
Top plate angle
more than rec-
ommended
Hook in side
plate cutting
edge
Cause
File held at less than recom-
mended angle.
Result
Slow cutting. Requires extra
effort to cut.
Remedy
File cutters to recommended
angle.
Cause
File held too low or the le
was too small.
Result
Rough cutting. Chain grabs.
Cutters dull quickly or won’t
hold a cutting edge.
Remedy
Check le size. File cutters to
recommended angle.
Cause
File held too high or the le
was too large.
Result
Cutters won’t feed into wood.
Slow cutting. Must force
chain to cut. Causes exces-
sive bottom wear.
Remedy
File cutters at recommended
angle. Check le size.
Cause
File held at more than recom-
mended angle.
Result
Cutting angle is very sharp
but will dull fast. Cutting ac-
tion rough and erratic.
Remedy
File cutters to recommended
angle.
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
wood:
1. The depth gauge setting determines
the depth of cut for each cutter.
2. The cutter’s leading edge enters the
wood, causing the entire cutter to
“rock back” and lift away from the
bar.
3. The top plate peels the severed
wood chip away.
4. The chip is discharged out the rear
of the cutter.
Saw Chain Performance
NOTE:
For consistent filing angles, use a filing guide.
2. After all cutters are sharpened, use
a depth gauge joiner to measure the
height of each depth gauge.
3. As required, use a flat file to lower
depth gauges to the appropriate
0.025” (0.635 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.
Use a Filing Gauge
Using a Depth gauge joiner
Using a Flat File to Round the Front
Corner on a Depth Gauge
Low depth
gauge
High depth
gauge
Cause
Wrong gauge setting or no
gauge used.
Result
Rough cutting. Chain grabs.
Saw won’t pull chain through
wood. Excessive wear on the
cutter heel.
Remedy
If depth gauges are too
low, the chain is no longer
serviceable.
Cause
Depth gauge never led.
Result
Slow cutting. Must force
chain to cut. Will cause
excessive wear on the cutter
heel.
Remedy
Lower gauges to recom-
mended setting.
IMPORTANT!
Most of the actual cutting is done by
the sides and corners of the individual
cutters!
Sharpening Technique
1. Using the appropriate round file,
sharpen all cutters to a 300angle as
shown.
IMPORTANT!
File all cutters to the same angle and
depth! Unequal ling may cause the
saw to vibrate or cut erratically!
0.025”
200500
Correct angle
on top plate Slightly protruding
hook
or point (curve on
non-chisel chain)
Top of depth guage
at correct height
below top plate
Front of
depth gauge
rounded
Keep all cutter lengths equal

19
What to Check
Does the engine crank?
Good compression?
Does the tank contain fresh
fuel of the proper grade?
Is fuel reaching the cylinder
and combustion chamber?
Is there spark at the spark
plug wire terminal?
Check the spark plug.
Possible Cause
Faulty recoil starter.
Fluid in the crankcase.
Internal damage.
Loose spark plug.
Excess wear on cylinder, piston, rings.
Stale or contaminated fuel mixture.
Check for clogged fuel filter and/or
vent.
Is the ignition switch ON?
Faulty ignition ground.
Faulty ignition system.
If the plug is wet, excess fuel may be in
the cylinder.
The plug may be fouled or improperly
gapped.
The plug may be damaged internally or
may be the wrong size.
Remedy
Consult with an authorized servicing
dealer.
Tighten and re-test.
Consult with an authorized servicing
dealer.
Drain and refill with fresh, clean
unleaded gasoline with a pump octane
of 87 or higher mixed with Shindaiwa
2-cycle mixing oil and gasoline at a
50:1 ratio).
Clean and replace as required and
re-start.
Move switch to ON
and re-start.
Consult with an authorized servicing
dealer.
Crank the engine with the plug re-
moved, replace the plug, and re-start.
See pg. 11 (Starting a flooded engine).
Clean and re-gap the plug to 0.024 inch
(0.6mm).Re-start.
Replace the plug with an NGK
BPMR7A. Re-start.
YES
NO
YES
YES
NO
NO
NO
YES NO
YES
ENGINE DOES NOT START
TROUBLESHOOTING

20
LOW POWER OUTPUT
TROUBLESHOOTING
What to Check
Is the engine overheating?
Engine is rough at all speeds. May
also have black smoke and/or un-
burned fuel at the exhaust.
Engine is knocking.
Possible Cause
Fan, fan cover, cylinder fins dirty or
damaged.
Operator is overworking the unit.
Carburetor mixture is too lean.
Improper fuel ratio
Carbon deposits on the piston or in the
muffler.
Clogged air filter.
Loose/damaged faulty spark plug.
Air leakage or clogged fuel line.
Water in the fuel.
Piston seizure.
Faulty carburetor.
Overheating condition.
Improper fuel.
Carbon deposits in the combustion
chamber.
Remedy
Clean, repair or replace as necessary.
Cut at a slower rate. Sharpen chain as
required.
Adjust carburetor or consult with an
authorized servicing dealer.
Drain and refill with fresh, clean un-
leaded gasoline with a pump octane of 87
or higher mixed with Shindaiwa 2-cycle
mixing oil and gasoline at a 50:1 ratio).
Consult with an authorized servicing
dealer.
Service the air cleaner.
Tighten or replace.
Repair or replace fuel filter and/or fuel
line.
Replace the fuel.
Consult with an authorized servicing
dealer.
See above.
Check fuel octane rating; check for
presence of alcohol in the fuel. Refuel as
necessary.
Consult with an authorized servicing
dealer.