MTD 170-TOA User manual

P. O. Box 1386, 97 KENT AVENUE, KITCHENER, ON N2G 4J1
Printed In USA
Safe Operation Practices • Set-Up • Operation • Maintenance • Troubleshooting • Warranty
WARNING
READ AND FOLLOW ALL SAFETY RULES AND INSTRUCTIONS IN THIS MANUAL
BEFORE ATTEMPTING TO OPERATE THIS MACHINE.
FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.
En g i n E Op E r a t O r ’sMa n u a l
208cc OHV Horizontal Shaft Engine — Model 170-TOA
769-05835A
02.19.10

This Operator’s Manual is an important part of your new engine. It will help you prepare and maintain the engine for the best
performance. Please read and understand the contents before operating the engine.
Thank You
Mo d e l Nu M b e r /Se r i a l Nu M b e r
/
Record Product Information
Before operating your new engine, please locate the model plate
on the engine and record the information in the provided area
to the right. This information will be necessary, should you seek
technical support via our web site or with your local dealer.
Customer Support
Please do NOT return the unit to the retailer from which it was purchased, without first contacting Customer Support.
If you have difficulty assembling this product or have any questions regarding the controls, operation, or maintenance of
this machine, you can seek help from the experts. Choose from the options below:
Visit our web at www.mtdcanada.ca◊
Locate your nearest dealer from Customer Support: 1-800-668-1238◊
Contact MTD CANADA • P.O. Box 1386 • 97 Kent Avenue • Kitchener, Ontario, Canada • N2G 4J1◊
To The Owner 1
2
Safe Operation Practices ........................................ 3
Safety Labels............................................................ 5
Set-Up ....................................................................... 6
Controls & Features................................................. 8
Operation................................................................. 9
Maintenance & Adjustments.................................10
Troubleshooting.....................................................13
Emission Control System Warranty Statement ..14
Illustrated Parts Lists..............................................16
Table of Contents

Important Safe Operation Practices 2
3
WARNING! This symbol points out important safety instructions which, if not followed,
could endanger the personal safety and/or property of yourself and others. Read and follow
all instructions in this manual before attempting to operate the equipment. Failure to
comply with these instructions may result in personal injury. When you see this symbol.
HEED IT’S WARNING!
DANGER! This machine was built to be operated according to the safe operation practices
in this manual. As with any type of power equipment, carelessness or error on the part of the
operator can result in serious injury. This machine is capable of amputating fingers, hands,
toes and feet and throwing foreign objects. Failure to observe the following safety
instructions could result in serious injury or death.
Training
Read, understand and follow all instructions on the engine1.
and in the manual(s) before attempting to assemble and
operate. Keep this manual in a safe place for future and
regular reference and for ordering replacment parts.
Be familiar with all controls and their proper operation.2.
Know how to stop the engine and disengage them quickly.
Never allow children under 14 years of age to operate the 3.
engine. Children 14 and over should read and understand
the instructions and safe operation practices in this manual
and on the engine and be trained and supervised by an
adult.
Never allow adults to operate the machine without proper4.
instruction.
Keep the area of operation clear of all persons, particularly 5.
small children and pets. Stop machine if anyone enters the
area.
Preparation
Thouroughly inspect the area where the equipment is to1.
be used. Remove all stones, sticks, wire and other foreign
objects which could be tripped over and cause personal
injury.
Wear sturdy, rough-soled work shoes and close fitting2.
slacks and shirts. Loose fitting clothes or jewelry can be
caught in the moving parts. Never operate the machine in
bare feet or sandals.
Disengage clutch levers and shift (if equipped) into nuetral3.
(“N”) before starting the engine.
Never leave the engine running while unattended.4.
Never attempt to make any adjustments while the engine5.
is running, except where specifically recommended in the
operator’s manual.
Safe Handling of Gasoline:
To avoid personal injury or property damage, use extreme6.
care in handling gasoline. Gasoline is extremely flammable
and the vapors are explosive. Serious personal injury can
occur when gasoline is splled on yourself and/or your
clothes which can ignite. Wash your skin and change
clothes immediately.
When adding fuel, turn engine OFF and let enginea.
cool at least 2 minutes before removing the gas cap.
Fill fuel tank outdoors or in well ventilated area.b.
Use only an approved gasoline container.c.
Never fill containers inside a vehicle or on a truckd.
or trailer bed with a plastic liner. Always place
containers on the ground away from your vehicle
before filling.
If possible, remove gas-powered equipment frome.
the truck or trailer and refuel it on the ground. If this
is not possible, then refuel such equipment on a
trailer with a portable container, rather than from a
gasoline dispenser nozzle.
Keep the nozzle in contact with the rim of the fuel f.
tank or container opening at all times until fueling is
complete. Do not use a nozzle lock-open device.
Do not overfill fuel tank. Fill tank to no more thang.
⁄ inch below the bottom of the filler neck to allow
space for fuel expansion.
Replace gasoline cap and tighten it securely.h.
If gasoline is spilled, wipe it off the engine and thei.
equipment. Move the machine to another area. Wait
five minutes before starting the engine.
To reduce fire hazards, keep the machine free ofj.
grass , leaves or other debris build up. Clean up oil or
fuel spillage and remove any fuel-soaked debris.
Keep gasoline away from sparks, open flames, pilot k.
lights, heat, and other ignition sources.

4sE c t i O n 2 — iM p O r t a n t En g i n E sa f E Op E r a t i O n pr a c t i c E s
Never fuel equipment indoors because flammablel.
vapors will accumulate in the area.
Extinguish all cigarettes, cigars, pipes, and otherm.
sources of ignition.
Check fuel line, tank, cap, and fittings frequently forn.
cracks or leaks. Replace if necessary.
Operation
When starting the engine, make sure spark plug, muffler,1.
and fuel cap are in place.
Do not crank engine with spark plug removed.2.
If fuel spills, wait until it evaporates before starting engine.3.
Allow muffler, engine cylinder, and fins to cool before4.
touching.
Keep children away from hot or running engines. They can 5.
suffer burns from a hot muffler.
Remove accumulated combustibles from muffler and6.
cylinder area.
Operate equipment with all guards in place.7.
Keep hands and feet away from rotating parts.8.
Tie up long hair and remove jewelry.9.
Do not wear loose-fitting clothing, dangling drawstrings or10.
items that could become caught.
When starting the engine, pull cord slowly until resistance11.
is felt, then pull rapidly.
Remove all external equipment/engine loads before12.
starting engine.
Direct coupled equipment components such as, but not13.
limited to blades, impellers, pulleys, sprockets, etc., must
be securely attached.
WARNING! Your Responsibility — Restrict the use of the engine to persons who read, understand, and follow the
warnings and instructions in this manual and on the machine.
SAVE THESE INSTRUCTIONS!
Maintenance & Storage
Keep the engine in safe working order1.
Allow the engine to cool at least five minutes before2.
storing. Never tamper with safety devices. Check their
proper operation regularly.
Check bolts and screws for proper tightness at frequent3.
intervals to keep the engine in safe working condition.
Visually inspect the engine for any damage.
Before cleaning, repairing or inspecting; stop the4.
engine and make certain all moving parts have stopped.
Disconnect the spark plug wire and ground it against the
engine to prevent unintended starting.
Do not change the engine governor settings or over-speed5.
the engine. The governor controls the maximum safe
operating speed of the engine.
Maintain and replace safety and instruction labels as6.
neccessary.
Always refer to the operator’s manual for important details7.
if the machine is to be stored for an exended period of
time.
If the fuel tank has to be drained, do this outdoors.8.
Observe proper disposal laws and requlations for gas, oil,9.
etc. to protect the environment.
Notice Regarding Emissions
Engines which are certified to comply with California and federal
EPA emission regulations for SORE (Small Off Road Equipment)
are certified to operate on regular unleaded gasoline, and
may include the following emission control systems: Engine
Modification (EM), Oxidizing Catalyst (OC), Secondary Air
Injection (SAI) and Three Way Catalyst (TWC) if so equipped.
Spark Arrestor
WARNING! This machine is equipped with an
internal combustion engine and should not be used
on or near any unimproved forest-covered, brush
covered or grass-covered land unless the engine’s
exhaust system is equipped with a spark arrester
meeting applicable local or state laws (if any).
If a spark arrester is used, it should be maintained in effective
working order by the operator. In the State of California the
above is required by law (Section 4442 of the California Public
Resources Code). Other states may have similar laws. Federal laws
apply on federal lands.
A spark arrester for the muffler is available through your nearest
engine authorized service dealer .

5sE c t i O n 2 — iM p O r t a n t En g i n E sa f E Op E r a t i O n pr a c t i c E s
International Safety Symbols and Meanings
SAFETY LABEL
This label warns you of potential hazards that can cause serious injury. Read it carefully. Refer to illustration below for explanation of
each symbol. If label(s) comes off or becomes hard to read, contact the dealer for replacement.
WARNING! Your Responsibility — Restrict the use of this power machine to persons who read, understand and
follow the warnings and instructions in this manual and on the machine.
SAVE THESE INSTRUCTIONS!

Gas & Oil
NOTE: The engine is shipped without gasoline or oil in the
engine. Running the engine with insufficient oil can cause
serious engine damage and void the engine warranty.
WARNING! Always keep hands and feet clear of
equipment moving parts. Do not use a pressurized
starting fluid. Vapors are flammable.
Oil Recommendations
Before starting engine, fill with motor oil, capacity is 600 ml/20
oz. Refer to viscosity chart in Fig. 2-1 for oil recommendations.
Do not over-fill. Use a 4-stroke, or an equivalent high detergent,
premium quality motor oil certified to meet or exceed
U.S. automobile manufacturer’s requirements for service
classification SG, SF. Motor oils classified SG, SF will show this
designation on the container.
NOTE: Do not use non-detergent oil or 2-stroke engine oil. It
could shorten the engine’s service life.
Checking Oil Level
NOTE: Be sure to check the oil while on a level surface with the
engine stopped.
Remove the oil filler cap/dipstick and wipe the dipstick1.
clean. See Fig. 2-2.
Insert the cap/dipstick into the oil filler neck, but do not2.
screw it in.
Remove the oil filler cap/dipstick. If the level is low, slowly3.
add oil until oil level registers between high (H) and low (L),
Fig. 2-2.
Replace and tighten cap/dipstick firmly before starting4.
engine.
NOTE: Do not overfill. Overfilling with oil may cause smoking,
hard starting, or spark plug fouling.
Fill
between
high
and low
marks
Oil Fill Cap/
Dipstick
Figure 2-1
-30º -20º
10w
20w
20
30
40
20w40, 20w50
15w40, 15w50
10w40
10w30
-10º 0º
0º 20º 40º 60º 80º 100º
10º 20º 30º 40º
-20º
(ºC)
(ºF)
Figure 2-2
Set-Up 3
6

Fuel Recommendations
Use automotive gasoline (unleaded or low leaded to minimize
combustion chamber deposits) with a minimum of 87 octane.
Gasoline with up to 10% ethanol or 15% MTBE (Methyl Tertiary
Butyl Ether) can be used. Never use an oil/gasoline mixture or
dirty gasoline. Avoid getting dirt, dust, or water in the fuel tank.
DO NOT use E85 gasoline.
WARNING! Gasoline is extremely flammable and is
explosive under certain conditions.
Refuel in a well-ventilated area with the engine stopped.•
Do not smoke or allow flames or sparks in the area where
the engine is refueled or where gasoline is stored.
Do not overfill the fuel tank. After refueling, make sure the•
tank cap is closed properly and securely.
Be careful not to spill fuel when refueling. Spilled fuel or•
fuel vapor may ignite. If any fuel is spilled, make sure the
area is dry before starting the engine.
Avoid repeated or prolonged contact with skin or•
breathing of vapor.
Adding Fuel
NOTE: Before refueling, allow engine to cool two minutes.
Clean around fuel fill before removing cap to fuel.1.
Fill tank until fuel reaches2. ⁄ inch below the bottom of the
filler neck to allow space for fuel expansion. Be careful not
to overfill.
Replace the gasoline cap and tighten securely.3.
7sE c t i O n 3 — sE t -up

Muffler
Air Filter
Throttle
Choke
Starter handle
Oil Filler Cap/Dipstick
Fuel Fill Cap
Oil Drain
Spark
Plug
Spark
Plug Boot
Right-Side View
Figure 4-1
Throttle
The throttle control regulates the speed of the engine and will
shut off the engine when it is moved into the stop position,
Choke
Activating the choke closes the choke plate on the carburetor
and aids in starting the engine.
Oil Drain
Removing the oil drain plug will drain the oil from the engine.
Oil Filler Cap & Dipstick
Remove the oil cap to check the oil level and add oil.
Fuel Fill Cap
Remove the gas cap to add fuel.
Starter Handle
Pull the starter handle to start the engine.
Controls and Features 4
8

Pre-Operation Check
The engine is shipped without gasoline or oil in the engine. See
the Set-Up Section of this manual for instructions on adding oil
and gasoline.
Starting the Engine
WARNING! Always keep hands and feet clear of
moving parts. Do not use a pressurized starting
fluid. Vapors are flammable.
NOTE: Allow the engine to warm up for a few minutes after
starting. The engine will not develop full power until it reaches
operating temperatures.
NOTE: Do not pull the starter handle while the engine is running.
Move throttle control to FAST (rabbit) position.1.
Move choke to the ON position.2.
Pull gently on the starter handle until it begins to3.
resist, then pull quickly and forcefully to overcome the
compression. Do not release the handle and allow it to
snap back. Return rope SLOWLY to original position. If
required, repeat this step.
As the engine warms, slowly slide the choke control to OFF4.
position. If the engine stalls, restart engine and run with
choke at half-choke position for a short period of time, and
then slowly rotate the choke into OFF position.
Stopping the Engine
WARNING! To avoid unsupervised engine
operation, never leave the engine unattended while
running. Turn the engine off after use.
Run engine for a few minutes before stopping to help dry off any
moisture on the engine.
Move throttle control to STOP position.1.
Wipe any moisture away from the controls on the engine.2.
Operation 5
9

Maintenance Schedule
First 5 Hours Each Use or
Every 5 Hrs.
Every Season
or 25 Hours
Every Season
or 50 Hours
Every Season
or 100 Hours
Service
Dates
Check Engine Oil Level P
Change Engine Oil P P
Check Air Cleaner P
Service Air Cleaner P
Check Spark Plug P
Replace Spark Plug P
Clean Engine Shroud P
Clean around muffler P
Replace Fuel Filter P
Periodic inspection and adjustment of the engine is essential
if high level performance is to be maintained. Regular
maintenance will also ensure a long service life. The required
service intervals and the kind of maintenance to be performed
are described in the table above. Follow the hourly or calendar
intervals, whichever occur first. More frequent service is required
when operating in adverse conditions.
WARNING! Shut off the engine before performing
any maintenance. To prevent accidental start-up,
disconnect the spark plug boot.
NOTE: If engine must be tipped to transport equipment or to
inspect or remove grass, keep spark plug side of engine up.
Transporting or tipping engine spark plug down may cause
smoking, hard starting, spark plug fouling, or oil saturation of air
cleaner.
WARNING! If the engine has been running, the
muffler will be very hot. Be careful not to touch the
muffler.
Oil
Check oil level regularly.•
See the Set-Up Section for instructions on checking oil.•
Changing the Oil
NOTE: Be sure to check engine on a level surface with the engine
stopped. Drain the oil while the engine is still warm to assure
rapid and complete draining.
Remove all fuel from tank by running engine until it stops1.
from lack of fuel.
Maintenance 6
10

Remove drain plug and allow oil to drain into a suitable2.
container. See Fig. 6-1.
WARNING! Before tipping engine or equipment to
drain oil, drain fuel from tank by running engine
until fuel tank is empty.
Reinstall the drain plug and tighten it securely.3.
Refill with the recommended oil — See the Set-up Section4.
— and check the oil level.
Reinstall the oil fill cap securely.5.
WARNING! Used motor oil may cause skin cancer if
repeatedly left in contact with the skin for
prolonged periods. Although this is unlikely unless
you handle used oil on a daily basis, it is still
advisable to thoroughly wash your hands with soap
and water as soon as possible after handling used
oil.
NOTE: Please dispose of used motor oil in a manner that is
compatible with the environment. We suggest you take it in a
sealed container to your local service station for reclamation. Do
not throw it in the trash or pour it on the ground.
Air Filter
Paper filters cannot be cleaned and must be replaced once a year
or every 100 operating hours; more often if used in extremely
dusty conditions.
WARNING! Never use gasoline or low flash point
solvents for cleaning the air cleaner element. A fire
or explosion could result.
NOTE: Never run the engine w ithout the air cleaner. Rapid
engine wear will result.
Press the tab on the air filter cover and lift the cover. See1.
Fig. 6-2. Replace paper element when dirty or damaged.
Clean foam element or replace when damaged.
To clean foam element, separate it from the paper element2.
and wash in liquid detergent and water. Allow to dry
thoroughly before using. Do not oil the foam element.
Spark Plug Service
WARNING! DO NOT check for spark with spark
plug removed. DO NOT crank engine with spark
plug removed.
To ensure proper engine operation, the spark plug must be
properly gapped and free of deposits.
Remove the spark plug boot and use a spark plug wrench1.
to remove the plug. See Fig. 6-3.
Oil
Drain
Figure 6-1
Air
Filter
Air Filter
Cover
Foam
Element
Figure 6-2
Spark Plug Spark Plug
Boot
Figure 6-3
11sE c t i O n 6 — Ma i n t E n a n c E

WARNING! If the engine has been running, the
muffler will be very hot. Be careful not to touch the
muffler.
2. Visually inspect the spark plug. Discard the spark plug
if there is apparent wear, or if the insulator is cracked or
chipped. Clean the spark plug with a wire brush if it is to be
reused.
3. Measure the plug gap with a feeler gauge. Correct as
necessary by bending side electrode. See Fig. 6-4. The gap
should be set to 0.030 in.
4. Check that the spark plug washer is in good condition
and thread the spark plug in by hand to prevent cross-
threading.
5. After the spark plug is seated, tighten with a spark plug
wrench to compress the washer.
NOTE: When installing a new spark plug, tighten ⁄ turn
after the spark plug seats to compress the washer. When
reinstalling a used spark plug, tighten ⁄-⁄ turn after the
spark plug seats to compress the washer.
NOTE: The spark plug must be securely tightened. An
improperly tightened spark plug can become very hot and
may damage the engine.
Cleaning the Engine
If the engine has been running, allow it to cool for at least half
an hour before cleaning. Periodically remove dirt build-up from
the engine. Clean around the muffler. Clean with a brush or
compressed air.
NOTE: Do not spray engine with water to clean because water
could contaminate fuel. Using a garden hose or pressure washing
equipment can also force water into the air cleaner or muffler
opening. Water in the air cleaner will soak the paper element,
and water that passes through the element or muffler can enter
the cylinder, causing damage.
WARNING! Accumulation of debris around muffler
could cause a fire. Inspect and clean before every
use.
OFFSEASON Storage
Engines stored between 30 and 90 days need to be treated with
a gasoline stabilizer and engines stored over 90 days need to be
drained of fuel to prevent deterioration and gum from forming
in fuel system or on essential carburetor parts. If the gasoline in
your engine deteriorates during storage, you may need to have
the carburetor, and other fuel system components, serviced or
replaced.
Remove all fuel from tank by running engine until it stops1.
from lack of fuel.
WARNING! Never leave engine unattended while it
is running.
Change the oil. See Changing the Oil earlier in this section.2.
Remove spark plug and pour about a3. ⁄ ounce of engine oil
into the cylinder. Replace spark plug and crank it slowly to
distribute oil.
Clean debris from around the engine and the muffler.4.
Touch up any damaged paint, and coat other areas that
may rust with a light film of oil.
Store in a clean, dry and well ventilated area away from any5.
appliance that operates with a flame or pilot light, such
as a furnace, water heater, or clothes dryer. Also avoid any
area with a spark producing electric motor, or where power
tools are operated.
If possible, also avoid storage areas with high humidity,6.
because that promotes rust and corrosion.
Keep the engine level in storage. Tilting can cause fuel or 7.
oil leakage.
0.02-0.03 in.
0.60-0.80 mm
Electrode
Figure 6-4
12 sE c t i O n 6— Ma i n t E n a n c E

Problem Cause Remedy
Engine Fails to start Engine flooded1.
Spark plug wire disconnected2.
Fuel tank empty or stale fuel3.
Engine not choked4.
Faulty spark plug5.
Throttle in stop position6.
Wait at least 10 minutes before starting1.
Connect wire to spark plug2.
Fill tank with clean, fresh gasoline3.
Choke engine4.
Clean, adjust gap or replace5.
Move throttle to FAST/Run position6.
Engine runs erratically Spark plug wire loose1.
Spark plug scorched, defective or electrode2.
gap is set incorrectly
Stale fuel3.
Engine running with choke on4.
Water or dirt in fuel system5.
Connect and tighten spark plug wire1.
Re-adjust electrode gap or change2.
Fill tank with clean, fresh gasoline3.
Move choke to off4.
Drain fuel tank. Refill with fresh fuel5.
Engine overheats Engine oil level low1. Fill engine with proper amount of engine oil1.
Troubleshooting 7
13

MTD CONSUMER GROUP INC (MTD), the California Air Resources Board (CARB)
and the United States Environment Protection Agency (U. S. EPA)
Emission Control System Warranty Statement
(Owner’s Defect Warranty Rights and Obligations)
EMISSION CONTROL SYSTEM COVERAGE IS APPLICABLE TO CERTIFIED ENGINES PURCHASED IN CALIFORNIA IN 2005 AND THERE-
AFTER, WHICH ARE USED IN CALIFORNIA, AND TO CERTIFIED MODEL YEAR 2005 AND LATER ENGINES WHICH ARE PURCHASED AND
USED ELSEWHERE IN THE UNITED STATES.
California and elsewhere in the United States Emission Control Defects Warranty Coverage
The California Air Resources Board (CARB), U. S. EPA and MTD are pleased to explain the emissions control system warranty on your model year
2006 and later small off-road engine. In California, new small off-road engines must be designed, built and equipped to meet the States anti-smog
standards. Elsewhere in the United States, new non-road, spark-ignition engines certified for model 2005 and later, must meet similar standards set
forth by the U. S. EPA. MTD must warranty the emission control system on your engine for the period of time listed below, provided there has been
no abuse, neglect or improper maintenance of your small off-road engine.
Your emission control system may include parts such as the carburetor, fuel-injection system, the ignition system, and catalytic converter, fuel tanks,
fuel lines, fuel caps, valves, canisters, filters, vapor hoses, clamps, connectors, and other associated emission-related components.
Where a warrantable condition exists, MTD will repair your small off-road engine at no cost to your including diagnosis, parts and labor.
MANUFACTURER’S WARRANTY COVERAGE:
This emissions control system is warranted for two years. If any emission-related part on your engine is defective, the part will be repaired or
replaced by MTD.
OWNER’S WARRANTY RESPONSIBILITIES:
As the small off-road engine owner, you are responsible for the performance of the required maintenance listed in your Owner’s Manual. MTD
recommends that you retain all your receipts covering maintenances on your small off-road engine, but MTD can not deny warranty solely for the
lack of receipts or for your failure to ensure the performance to all scheduled maintenance.
As the small off-road engine owner, you should however be aware that MTD may deny your warranty coverage if your small off-road engine or part
has failed due to abuse, neglect, improper maintenance or unapproved modifications.
You are responsible for presenting your small off-road engine to an Authorized MTD Service Dealer as soon as a problem exists. The warranted
repairs should be completed in a reasonable amount of time, not to exceed 30 days.
If you have any questions regarding your warranty rights and responsibilities, you should contact a MTD Service Representative.
In the U.S.A.: MTD LLC at P.O. Box 361131, Cleveland, Ohio 44136-0019, or call 1-800-800-7310 or 1-330-220-4683 or
log on to our Web site at www.mtdproducts.com.
In Canada: MTD Products Limited, Kitchener, ON N2G 4J1, or call 1-800-668-1238 or log on to our Web site at www.mtdcanada.com.
DEFECTS WARRANTY REqUIREMENTS FOR 1995 AND LATER SMALL OFF-ROAD ENGINES:
This section applies to 1995 and later small off-road engines. The warranty period begins on the date the engine or equipment is delivered to an
ultimate purchaser.
(a) General Emissions Warranty Coverage
MTD must warrant to the ultimate purchaser and each subsequent purchaser that the engine is:
1. Designed, built, and equipped so as to conform with all applicable regulations adopted by the Air Resources Board pursuant to its authority in
Chapters 1 and 2,Part 5, Division 26 of the Health and Safety Code; and
2. Free from defects in materials and workmanship that cause the failure of a warranted part to be identical in all material respects to the part as
described in the engine manufacturer’s application for certification for a period of two years.
(b) The warranty on emissions-related parts will be interpreted as follows:
1. Any warranted part that is not scheduled for replacement as required maintenance in the written instructions required by Subsection (c) must be warranted for
the warranty period defined in Subsection (a)(2). If any such part fails during the period of warranty coverage, it must be repaired or replaced by MTD accord-
ing to Subsection (4) below. Any such part repaired or replaced under the warranty must be warranted for the remaining warranty period.
2. Any warranted part that is scheduled only for regular inspection in the written instructions required by Subsection (c) must be warranted for the warranty period
defined in Subsection (a)(2). A statement in such written instructions to the effect of “repair or replace as necessary” will not reduce the period of warranty
coverage. Any such part repaired or replaced under warranty must be warranted for the remaining warranty period.
3. Any warranted part that which is scheduled for replacement as required maintenance in the written instructions required by Subsection (c) must be warranted
for the period of time prior to the first scheduled replacement point for that part. If the part fails prior to the first scheduled replacement, the part must be
repaired or replaced by MTD according to Subsection (4) below. Any such part repaired or replaced under warranty must be warranted for the remainder of the
period prior to the first scheduled replacement point for the part.

4. Repair or replacement of any warranted part under the warranty provisions of this article must be performed at no charge to the owner at a warranty station.
5. Notwithstanding the provisions of Subsection (4) above, warranty services or repairs must be provided at all MTD distribution centers that are franchised to
service the subject engines.
6. The owner must not be charged for diagnostic labor that leads to the determination that a warranted part is in fact defective, provided that such diagnostic work
is performed at a warranty station.
7. The engine manufacturer is liable for damages to other engine components proximately caused by a failure under warranty of any warranted part.
8. Throughout the engine’s warranty period defined in Subsection (a)(2), MTD will maintain a supply of warranted parts sufficient to meet the expected demand
for such parts.
9. Any replacement part may be used in the performance of any warranty maintenance or repairs and must be provided without charge to the owner. Such use will
not reduce the warranty obligations of MTD.
10. Add-on or modified parts that are not exempted by the Air Resources Board may not be used. The use of any non-exempted add-on or modified parts shall be
grounds for disallowing a warranty claim made in accordance with this article. The engine manufacturer shall not be liable under this article to warrant failures
of warranted parts caused by the use of non-exempted add-on or modified part.
(c) MTD will include a copy of the following emission warranty parts list with each new engine, using those por-
tions of the list applicable to the engine.
1. Fuel Metering System
 •Coldstartenrichmentsystem(softchoke)
 •Carburetorandinternalparts
 •FuelPump
 •FuelTank
2. Air Induction System
 •Aircleaner
 •Intakemanifold
3. Ignition System
 •Sparkplug(s)
 •MagnetoIgnitionSystem
4. Exhaust System
 •Catalyticconverter
 •SAI(Reedvalve)
5. Miscellaneous Items Used in Above System
 •Vacuum,temperature,position,timesensitivevalvesandswitches
 •Connectorsandassemblies
6. Evaporative control
 •FuelHosecertifiedforARBevaporativeemissionof2006.
 •FuelHoseClamps
 •Tetheredfuelcap
 •Carboncanister
 •Vaporlines
GDOC-100174CN Rev. B

91
91
95
109
110
94
95
87
92
86
85
65
65
67
65 64
63
62
57 61
58
56
51
59 57
55
54
53
60
66
68
86 88
89
52
46
48
47
40
17
42
39
44
43
46
50
68
70 73
74
69
74
71
45
16
18
16
19
14
11
19
16
15
10
9
8
7
6
2
4
5
1
1
20
12 13
3
24
25
27
26
28 32
31
30
35
75
76
77
33
29
36
37
38
33
78
49
49
81 82
83
84
83
82
83
82
91
98
98
49
97
49
90
103
102
101
100 105
107
106
23 23
21
22
16
Engine Model/ Modèle de moteur - 170-T0A

17
Engine Model/ Modèle de moteur - 170-T0A
NOTE: Illustrated parts without a numeric call-out are not servicable components.
REMARQUE : Les pièces illustrées sans chires-références sont des pièces non disponibles.
Ref. No. /
Réf.
Part No./
No. de pièce Description
Désignation
1710-04917 Bolt Boulon
2951-11054A Valve Cover Couvercle du soupape
3731-07059 Breather Hose Tuyau
4726-04101 Breather Hose Clamp Collier
5951-11565 Valve Cover Gasket Joint de cache-soupape
6751-11124 Nut, Pivot Locking Écrou
7751-11123 Valve Adjusting Nut Écrou
9710-04902 Rocker Arm Stud Clou
16 710-05100 Cylinder Head Bolt Boulon de culasse
18 951-10292 Spark Plug Bougie
19 710 - 0 4911 Muer Stud Clou de silencieux
21 712-04214 Nut Écrou
22 951-10793 Muer Assembly Silencieux
23 710-05002 Bolt Boulon
24 710-05101 Carburetor Stud Clou du carburateur
25 751-11567 Carburetor Insulator Gasket Joint d’isolateur du carburateur
26 951-1156 8 Carburetor Insulator Isolateur du carburateur
27 951-11569 Carburetor Gasket Joint du carburateur
29 951-11571 Carburetor Gasket Plate Plaque de joint du carburateur
30 951-10806 Air Cleaner Housing Habitacle du ltre à air
31 712-04213 Nut Écrou
32 951-11067 Throttle Control Knob Bouton - commande des gaz
33 710-05102 Self-Tapping Bolt Boulon
39 951-11572 Cylinder Head Gasket Joint de culasse
42 715-04090 Dowel Pin Goupille
45 951-11253 Piston Ring Set Ensemble de segments de piston
49 710-04915 Bolt Boulon
50 951-11113 Air Shield Protecteur
51 951-11573 Connecting Rod Assembly Bielle
52 951-11356 Governor Arm Shaft Arbre de bras du régulateur
53 736-04461 Governor Shaft O-Ring Bague en «O»
54 951-11574 Governor Seal Joint du régulateur
55 714-04078 Cotter Pin Goupille fendue
56 951-11575 Camshaft Assembly Arbre à came
57 951-11369 Radial Ball Bearing Roulement à billes radial
59 951-10307 Flywheel Key Clé
60 951-11576 Governor Assembly Régulateur
61 715-04092 Dowel Pin, 7 x 14 Goupille, 7 x 14
62 715-04089 Dowel Pin, 9 x 14 Goupille 9 x 14
63 951-11371 Crankcase Cover Gasket Joint de couvercle du culasse

18
Engine Model/ Modèle de moteur - 170-T0A
NOTE: Illustrated parts without a numeric call-out are not servicable components.
REMARQUE : Les pièces illustrées sans chires-références sont des pièces non disponibles.
Ref. No. /
Réf.
Part No./
No. de pièce Description
Désignation
65 710-04932 Bolt Boulon
66 951-11577 O-Ring Bague en «O»
68 951-11578 Oil Seal Joint d’huile
70 736-04440 Oil Drain Plug Washer Rondelle - bouchon d’huile
71 710-04906 Oil Drain Plug Bouchon d’huile
73 951-10792 Ignition Coil Bobine d’allumage
74 710-04919 Bolt Boulon
75 951-10805 Flywheel Volant
76 951-10934 Cooling Fan Ventilateur
77 951-10911 Starter Cup Tamis du démarreur
78 712-04209 Nut Écrou
81 951-11583 Blower Housing Carter
82 736-04455 Washer Rondelle
83 710-04914 Bolt Boulon
84 951-10790 Recoil Starter Assembly Poignée du démarreur
85 951-1158 4 Primer Bracket Support d’amorceur
86 710-05103 Bolt Boulon
87 951-11585 Governor Spring Ressort de la regulateur
88 951-10664 Throttle Linkage Spring Ressort de la timonerie d’accélérateur
89 951-10665 Throttle Linkage Timonerie d’accélérateur
90 951-11106 Governor Arm Bras du régulateur
91 712-04212 Nut Écrou
92 710-04908 Governor Arm Bolt Boulon de bras du régulateur
97 951-10662 Engine/Dipstick Cover Couvercle de la jauge
98 710-04905 Bolt Boulon
100 951-11380 O-Ring Bague en «O»
101 951-10656 Dipstick Tube Tuyau de la jauge
106 951-10652 Fuel Filter Filtre à carburant
107 951-10796 Fuel Tank Réservoir d’essence
109 710-04918 Bolt Boulon
110 951-11109 Blower Housing Shield Protecteur de la carter
a951-11177 Choke Control Lever Levier de commande d’étrangleur
s951-11589 Fuel Bowl Gasket Joint
u710-04904 Fuel Bowl Bolt Gasket joint
v710-04945 Fuel Bowl Mounting Bolt Boulon
w951-11349 Fuel Drain Plug Gasket Joint
x710-04903 Fuel Drain Bolt Boulon
—951-10829 Spark Arrestor (Not Shown) Pare-étincelles (non illustrée)
—951-10651 Fuel Tank Nipple (Not Shown) Raccord de réservoir à carburant (non illustrée)

19
Engine Model/ Modèle de moteur - 170-T0A
Ref. No. /
Réf.
Part No./
No. de pièce Description
Désignation
—951-10798A Short Block Bloc moteur embiellé
5951-11565 Valve Cover Gasket Joint de couvercle du soupape
20 — Exhaust Pipe Gasket Joint
25 751-11567 Carburetor Insulator Gasket Joint d’isolateur du carburateur
26 951-1156 8 Carburetor Insulator Isolateur du carburateur
29 951-11571 Carburetor Gasket Plate Plaque - joint du carburateur
39 951-11572 Cylinder Head Gasket Joint de culasse
41 — Valve Lifter Poussoir
45 951-11253 Piston Ring Set Segments de piston
46 — Piston Pin Clip Attache, piston d’axe
47 —Piston Piston
48 — Piston Pin Piston d’axe
51 951-11573 Connecting Rod Assembly Bielle
52 951-11356 Governor Arm Shaft Arbre de bras du régulateur
53 736-04461 Governor Shaft O-Ring Bague en «O»
54 951-11574 Governor Seal Joint du régulateur
55 714-04078 Cotter Pin Goupille fendue
56 951-11575 Camshaft Assembly Arbre de came
57 951-11369 Radial Ball Bearing Roulement à billes radial
58 — Crankshaft Assembly Vilebrequin
60 951-11576 Governor Assembly Régulateur
61 715-04092 Dowel Pin, 7 x 14 Goupille, 7 x 14
62 715-04089 Dowel Pin, 9 x 14 Goupille, 9 x 14
63 951-11371 Crankcase Cover Gasket Joint
64 — Crankcase Cover Couvercle de carter de la moteur
65 710-04932 Bolt Boulon
66 951-11577 O-Ring Bague en «O»
67 — Oil Filler Plug Bouchon
68 951-11578 Oil Seal Joint de l’huile
69 — Crankcase Complete Carter de moteur complet
70 736-04440 Oil Drain Plug Washer Rondelle - bouchon d’huile
71 710-04906 Oil Drain Plug Bouchon de vidange d’huile
—951-11587 Crankshaft Kit Trousse - carter de moteur
57 951-11369 Radial Ball Bearing Roulement à billes radial
58 — Crankshaft Assembly Vilebrequin
59 951-10307 Flywheel Key Clé
63 951-11371 Crankcase Cover Gasket Joint
68 951-11578 Oil Seal Joint d’huile
—951-11063A Valve Cover Gasket Kit Trousse - joint de couvercle de cache-soupape
2951-11054A Valve Cover Couvercle de cache-soupape
5951-11565 Valve Cover Gasket Joint de cache-soupapes
NOTE: Illustrated parts without a numeric call-out are not servicable components.
REMARQUE : Les pièces illustrées sans chires-références sont des pièces non disponibles.

20
Engine Model/ Modèle de moteur - 170-T0A
NOTE: Illustrated parts without a numeric call-out are not servicable components.
REMARQUE : Les pièces illustrées sans chires-références sont des pièces non disponibles.
Ref. No. /
Réf.
Part No./
No. de pièce Description
Désignation
—951-10799 Cylinder Head Assembly Culasse
5951-11565 Valve Cover Gasket Joint - Couvercle de cache-soupapes
7751-11123 Valve Adjusting Nut Écrou
8 — Rocker Arm Bras
9710-04902 Rocker Arm Stud Clou
10 — Push Rod Guide Guidage
11 — Valve Spring Retainer-Intake Ressort de soupape d’admission
12 — Exhaust Valve Adjustor Réglager de la soupape d’échappement
13 — Valve Spring Retainer-Exhaust Coupelle mobile de ressort de soupape
14 — Valve Spring Ressort de soupape
17 — Cylinder Head Culasse
20 — Exhaust Pipe Gasket Joint de tuyau d’échappement
25 751-11567 Carburetor Insulator Gasket Joint d’isolateur du carburateur
26 951-1156 8 Carburetor Insulator Isolateur du carburateur
39 951-11572 Cylinder Head Gasket Joint de culasse
42 715-04090 Dowel Pin Goupille
43 — Exhaust Valve Soupape d’échappement
44 — Intake Valve Soupape d’admission
—951-1158 6 Crankcase Cover Kit Trousse - Couvercle de carter de moteur
57 951-11369 Radial Ball Bearing Roulement à billes radial
63 951-11371 Crankcase Cover Gasket Joint de couvercle de la carter du moteur
64 — Crankcase Cover Couvercle de la carter du moteur
65 710-04932 Bolt Boulon
68 951-11578 Oil Seal Joint d’huile
—951-1158 8 Crankcase Kit Trousse - carter de moteur
52 951-11356 Governor Arm Shaft Arbre de bras du régulateur
53 736-04461 Governor Shaft O-Ring Bague en «O»
54 951-11574 Governor Seal Joint du régulateur
55 714-04078 Cotter Pin Goupille fendue
57 951-11369 Radial Ball Bearing Roulement à billes radial
68 951-11578 Oil Seal Joint d’huile
69 — Crankcase Complete Carter de moteur complet
—951-10801A Gasket Kit - External Ensemble de joints - externes
20 — Exhaust Pipe Gasket Joint
25 751-11567 Carburetor Insulator Gasket Joint d’isolateur du carburateur
27 951-11569 Carburetor Gasket Joint du carburateur
66 951-11577 O-Ring Bague en «O»
70 736-04440 Oil Drain Plug Washer Rondelle de bouchon d’huile
—951-10818 Air Cleaner Housing Assembly Carter de ltre à air
35 — Lower Housing Carter inférieur
38 — Upper Housing Carter supérieur