Craftsman 917.378170 User manual

L17,378 70 OWNER'S MANUAL
®
Assembly
° Operation
,Maintenance
°Service
. Adjustments
° Repair Parts
Caution:
Read and Follow
aHJSafety Ru_es
and instructions
Before Operating
This Equipment
\
L rl1'° "I ...... II']l"1............................ '1...................i,¸'¸',l.....

SAFETY' RULES
& 0AUT'ON:ALWAYO,SOONNEOTS A KPLUOW,.EANOP O W,R W. °E,TO .NOTCONT CT R*&
RF_PAIRS. iMPORTANT
SAFETY STAN DARDS REQUIRE OPERATOR PRESENCE CONTROLS TO MINIMIZE THE RISK OF INJU RY, YOUR UNIT iS EQUIPPED WITH SUCH
CONTROLS. DO NOT ATTEMPT TO DEFEAT THE FUNCTION OF THE OPERATOR PRESENCE CONTROLS UNDER ANY CIRCUMSTANCES,
TRAINING:
Read this operator's manual carefully, Become famitiar with
the controls and know how to operate your mower properly,
Learn how to quickty slop mower,
• Do not altow children to use your mower. Never altow adults
to use mower without proper instructions. :i::i_
• Keep the area of operation clear of alf person:s_i!_e_eciaHy
small children and pets.
,Use mower only as the manufacturer in_.er_d_i.and as de-,
scribed in this manual, ..:_i:i'!i ' .
• , ,' 0,:" '
o Do not operate mower _fit has been i.d..r0pp;edolr-damaged m
any manner, Always have damag._;rffpa;i_ed 'before using
your mower, : _':_i,;'
°Do not use accessory attach_entsthat ai;enot recommended
by the manufacturer, Us_i!iof_iSu,ch attachments may be
hazardous. ,:_:i::i:i":'_i:_:::::.i:_
° Be aware that the m_r-,blA_e turns when the engine is
running.
pREPARATION("_"_: ...........
• Always thorough!y check the area to be mowed and clear it of
all stones, sticks;;wires, bones, and other foreign objects.
These objects wilt be thrown by the blade and can cause
severe injury. '
• Always wear safety glasses or eye shields when starting and
while using your mower.
Dress properly, Do not operate mower when barefoot or
wearing open sandals. Wear only solid shoes with good
traction when mowing.
Check fuel tank before starting engine. Do not fi_tgas tank
indoors, when the engine is running or when the engine is hot,
Allow the .engine to coot for several minutes before filling the
gas tank. Clean off any spilled gasoline bdore starling the
engine.
Always make wheel height adjustments before starting your
mower. Never attempt to do this while the engine is running,
, Mow only in daylight or good artificial light,
OPERATION:
Keep your eyes and mind on your mower and the area being
cut. Do not let other interests distract you. o
Do not mow wet or slippery grass. Never run while operating
your mower. ALways be sure of your footing - keep afirm hotd °
on the handles and walk, °
Do not put hands or feet near or under rotating parts, Keep
clear of the discharge opening at all times,
Always stop the engine whenever you leave or are not using
your mower, or before crossing driveways, walks, roads, and
any gravePcovered areas,
Never direct discharge of material toward bystanders nor
allow anyone near the mower while you are operating it,
Before cleaning, inspecting, or repairing your mower, stop
the engine and make absolutely sure the blade and all
moving parts have stopped. Then disconnect the spark plug
wire and keep it away from the spark plug to prevent
accidental starting.
Do not continue to run your mower if you hit a foreign object,
Fottow the procedure outlined above, then repair any dam-
age before restarting and operating you mower.
• Do not change the governor settings or overspeed the
engine. Engine damage or personal injury may result.
- Do not operate your mower if it vibrates abnormally, Exces-
sive vibration is an indication of damage; stop the engine,
safely check for the cause ofvibration and repair as required.
Do not run the engine indoors, Exhaust fumes are danger-
ous.
o Never cut grass by pulling the mower towards you. Mow
across the face of slopes, never up and down or you might
lose your footing. Do not mow excessively steep slopes.
Use caution when operating the mower on uneven terrain or
when changing directions - maintain good footing.
• Never operate your mower without proper guards, plates,
grass catcher or other safety devices in place.
MAINTENANCE AND STORAGE:
, Check the blade and the engine mounting bolts often to be
sure they are tighlened properly.
o Check al_ bolts, nuts and screws at frequent intervals for
proper tigt_tness to be sure mower is in safe working condi-
tion.
, Keep alt safety devices in place and v¢orking.
o To reduce fire hazard, keep the engine free of grass, leaves
or excessive grease and oil
o Check grass catcher often for deterioration and wear and
replace worn bags. Use onty replacement bags that are
recommended by and comply with specifications of the
manufacturer of your mower.
Always keep a sharp blade on your mower,
Aflow engine to cool before storing in any enclosure.
Never store mower with fueI in the tank inside a building
where fumes may reach an open flame or an ignition source
such as a hot water heater, space heater, clothes dryer, etc.
LOOK FOR THIS SYMBOL 3"O POINT OUT _MPORTANT SAFE!rY PRECAUTIONS,IT MEANS _ ATTENTIONS!! BECOME ALERT!!! YOUR SAFETY IS INVOLVED_
2

CONGRATULATmONS on your purchase of a Sears
Craftsman Lawn Mower, It has been designed, engineered
and manufactured to give you the best possible de-
pendability and performance.
Should you experience any probtems you cannot easily
.........._medy, please contact your nearest Sears Service Cen-
,eriDepartment. Sears has competent, well trained tech-
nicians and the proper tools to service or repair this unit.
Please read and retain this manual. The instructions will
enable you to assemble and maintain your lawn mower
properly, Always observe the SAFETY RULES'.
MODEL
NUMBER 917.378170
SERIAL
NUMBER
DATE OF
PURCHASE
THE MODEL AND SERIAL NUMBERS WILL BE
FOUND ON A DECAL ATTACHED TO THE REAR
OF THE LAWN MOWER HOUSING,
YOU SHOULD RECORD BOTH SERIAL NUMBER
AND DATE OF PURCHASE AND KEEP tN A SAFE
PLACE FOR FUTURE REFERENCE.
PRODUCT SPECIFtCATHONS
HORSEPOWER: 3.5
DISPLACEMENT: 9.06 cu. in.
GASOLINE CAPACITY: 1.5 quarts
(Unleaded)
OIL (20 oz. Capacity): SAE 30 or
(SAE ! 0W30)
SPARK PLUG (GAP .030 IN.):
(0.76 ram) Champion
RJ 19LM or
Sears z.t 33312
or STD 36t458
or STD 360950
VALVE CLEARANCE: Intake: .008 in.
Exhaust: .008 in.
SOLID STATE IGNITION
AIR GAP: .0125 in.
BLADE BOLT TORQUE: 35-40 ft.-tbs.
MAINTENANCE AGREEM ENT
A Sears Maintenance Agreement is available on this product. Contact your nearest Sears store for details.
CUSTOMER RESPONSiBiLiTIES
• Road and observe the safety rules.
Follow a regular schedule in maintaining, caring for and using your lawn mower.
•Follow the instructions under "Maintenance" and "Storage" sections of this Owner's Manual.
LtMaTED ONE YEAR WARRANTY ON CRAFTSMAN POWER MOWER
For one year from date of purchase, when this Craftsman Lawn Mower is maintained, lubricated, and tuned up
according to the operating and maintenance instructions in the owner's manual, Sears wil! repair free of charge any
defect in material or workmanship.
If this Craftsman Lawn Mower is used for commercial or rental purposes, this warranty applies for only 90 days from
the date of purchase.
This Warranty does not cover:
• Expendable items which become worn during normal use, such as rotary mower blades, blade adapters, belts,
air cleaners and spark plug.
• Repairs necessary because of operator abuse or negligence, including bent crankshafts and the failure to
maintain the equipment according to the instructions contained in the owner's manual.
WARRANTY SERVICE IS AVAILABLE BY RETURNING THE CRAFTSMAN POWER MOWER TO THE NEAREST
SEARS SERVICE CENTER!DEPARTMENT IN THE UNITED STATES. THIS WARRANTY APPLIES ONLY WHILE
THIS PRODUCT tS IN USE IN THE UNITED STATES.
This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
SEARS, ROEBUCK AND CO., D/731CR-W SEARS TOWER, CHICAGO, IL 60684
3

TABLE OF CONTENTS
SAFETY RULES ............................................. 2
PRODUCT SPECiFiCATiONS., ................ ,..... 3
CUSTOMER RESPONSiBiLiTiES ................. 3
WARRANTY ................................................... 3
LAWN MOWER ACCESSORIES ................... 5
ASSEMBLY ......................................... ........... 5
OPERATION ................................................... 6
MAINTENANCE .............................................. 9
SERVICE AND ADJUSTMENTS .................. 12
STORAGE ..................................................... 1_
TROUBLESHOOTING .................................. 23
REPAmR PARTS = LAWN MOWER ......... 15-1g
REPAIR PARTS = ENGINE ...................... 20-22
PARTS ORDERING/SERVICE ,BACK COVER
mNDEX
A
Accessories ............................................ 5
Adjustments:
Carburetor .................................. 13
Drive ControJ Cable ................... 12
Handle Height ............................ t3
Height of Cut .............................. 12
Air Filter:
Service ........................................ 11
Assembly:
Handle .......................................... 5
B
Blade:
Sharpening ................................. 10
Replacement .............................. 10
C
Controls'.
Operator Presence Control Bar .6
Dr_ve Control ............................... 6
Customer Responsibilities ................ 3
E
Engine:
Oi_Change ................................. 11
Oil Level ..................................... 11
Oil Type ...................................... 11
Starting ......................................... 8
Storage ....................................... 15
F
FuehType .............................................. B
Storage ....................................... 14
H
Handle:
Adjustment ................................. 13
Assembly ..................................... 5
L
Lubrication:
Engine .......................................... 9
Discharge Guard Hinge Pin ........ g
Handle Bracket Mounting Pin ....9
Wheel Adjuster ............................ g
Brake Spring Bracket .................. 9
M
Maintenance:
Agreement .................................... 3
Air Filter ...................................... 11
Blade Care/Replacement .......... 10
Drive Wheels .............................. 10
Englne ........................................ 11
Lubrication ................................... g
Spark Plug .................................. tl
Mowing Tips ........................................ 8
0
Oil: Engine .......................................... 8
Storage ....................................... 14
Operation:
Operating Lawn Mower ........... 6-8
ControlBar................................... 8
Throttle Control ........................... B
Operator Presence Control Bar ......... B
.Options:
Attachments .................................5
P
Repair Parts
Lawn Mower ........................... 15-19
Engine ................................... 2022
R
Responsibilities, Customer ............... 3
S
Safety Rules ........................................ 2
Service and Adjustments:
Carburetor .................................. 13
Drive Control Cable ................... 12
Drive Belt ................................... 12
Engine Speed ............................ 13
Handle ........................................ 13
Service Recommendations ................ 9
Spark Plug ......................................... 1'
Specifications ..................................... 3
Starting the Engine:
Drive Control ............................... 7
Stopping the Engine ........................... 8
Storage .............................................. 14
T
Throttle Control ................................ 13
Trouble Shooting Chart ................... 23
W
Warranty .............................................. 3
Wheels:
Wheel Adjusters .......................... B
4

LAWN MOWE ACCESSO
......_.heseaccessories were available when this lawn mower was produced, They are also available at most Sears retail o_,.ets,
catabg and service centers, Most Sears stores can also order repair parts for you, when you provide the model number of
your lawn mower. Some of these accessories may not apply to your lawn mower.
[HGJNE
SPARKPLU_ MUFFLER
__ -- ©
LAWNMOWERMAINTENANCE
8[LT
AIR FILTER GASCAH
m_
BLADE BL_#EAPAPTER
ENG|NEO_L STASiLlZ[R
WHE[LS . LAWNMOW[ACOVER
ASS LY
Your lawn mower has been assembled at the factory.
TO REMOVE LAWN MOWER FROM
CARTON
° Remove loose parts included with mower.
o Cut down two end corners of carton and lay end panel
down flat,
o Remove all packing materials except padding be-
tween upper and Iower handle and padding holding
operator presence control bar to upper handle.
° Roll lawn mower out of carton and check carton
thorougNy for additionaI loose parts.
HOW TO SET UP YOUR LAWN
MOWER
TO UNFOLD HANDLE (See Fig. 1)
oRaise handles until tower handle section tocks into
place in mowing position,
. Raise upper handfe section into place on lower handle,
remove protective padd{ng and tighten both handle
knobs,
Remove handle padding holding operator presence
contro_ bar to upper handle.
. Your lawn mower handle can be adjusted for your
mowing comfort, Refer to "Adjust Handle" in the
Service and Adjustment section of this manual.
OPERATOR PRESENCE
CONTROL BAR
UPPER HANDLE
LIFT UP
{MOWING POSfT|ON
LOWER HANDLE
FiG. 1
5

OP ATION
KNOW YOUR LAWN MOWER
READ THIS OWNER'S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR LAWN MOWER, Compare th_
illustrations with your lawn mower to familiarize yourself with the location ofvarious controls and adjustments, Save this manual
for future reference.
OPERATOR PRESENCE CONTROLBAR
DRIVE CONTROL LEVER
DRIVE ANDZONECONTROL
STARTER HANDLE
HANDLE KNOB
CABLE CLIPS
,GASOLINE FILL CAP
ENGINE OiL CAP WITH DIPSTICK
PRIMER
DRIVE COVER
DISCHARGE GUARD
WHEELADJUSTER
(ON EACH WHEE_
HOUSING
FIG. 2
MEETS CPSC SAFETY REQUIREMENTS
Sears rotary walk-behind power lawn mowers conform to the safety standards of the American National Standards Institute
and the U.S. Consumer Product Safety Commission. The blade turns when the engine is running.
OPERATOR PRESENCE CONTROL - must be held down
to the handle to start the engine. Release to stop the
engine.
PRIMER - pumps additional fuel from the carburetor to the
cylinder for use when starting a cold engine,
STARTER HANDLE - used for starting the engine.
DRIVE CONTROL LEVER - used to engage power-pro-
pelled forward motion of lawn mower.
6

OPERATION
...........:_OW TO USE YOUR LAWN MOWER
ENGINE SPEED
The engine speed was set at the factory for optimum
performance, Speed is not adjustable.
ENGINE ZONE CONTROL
CAUTION: Federat regulations require
an engine controt to be installed on this
lawn mower in order to minimize the
risk of blade contact injury. Do not un-
de_ any circumstances attempt to de-
feat the function of the operator control,
The blade turns when the engine is
running.
• Your Iawn mower is equipped with an operator pres-
ence control bar which requires the operator to be
positioned behind the tawn mower handle to start and
operate the lawn mower.
DRIVE CONTROL (See F_go 3)
o Self-propelling is controfied by holding the operator
presence control bar down to the handle and pushing
the drive controt lever forward until it clicks; then
release the lever.
o Forward motion wiff stop when the operator presence
control bar is released. To stop forward motion without
: stopping engine, releasethe operator presence control
bar slightty until the drive control disengages. Hold
operator presence contro! bar down to handle to con-
tinue mowing without self-propelling.
, To keep drive control engaged when turning corners,
push down on handle and lift front wheels off ground
while turning lawn mower.
TO ADJUST CUTTING HEIGHT (See Fig, 4)
o Raise wheels for low cut and lower wheels for high cut.
• Wheels are set in low cut for shipping. Adjust cutting
height to suit your requirements. Medium position is
best for most lawns.
, To change cutting height, squeeze adjuster lever to-
ward wheel. Move wheeJ up or down to suit your
requirements. Be sure allwheels are in the same
setting.
OPERATOR PRESENCE
CONTROL BAR
DRIVE DRIVE
CONTROL CONTROL
TO ENGAGE DRIVE CONTROL
FIG. 3
LOWER WHEELS
FOR HiGH CUT RAISE WHEELS
FOR LOW CUT
FIG. 4
7

OPERA 0
BEFORE STARTXNG ENGINE
OiL (See Fig. 5)
A 20 oz. bottle of Pennzoi] SAE 30 oil is included with your
new lawn mower.
• Remove engine oil cap and fill to the FULL line on the
dipstick.
o Use 20 ozs. of SAE 30 oit. SAE t0W30 oil can atso be
used.
• DO NOT use SAE t0W 40 oil.
• POUR OIL SLOWLY. DO NOT OVERFILL.
o Check oil level before each use. Add oil if needed. Fill
to FULL fine On dipstick.
o To read proper level, tighten engine oil cap each time.
o Reinstall engine oil cap and tighten.
o After the first two (2) hours of mowing, change the oil,
and every 25 hours thereafter. You may need to
change the oil more often under dusty, dirty conditions.
GAS (See Fig. 5)
• Fill gasoline tank with fresh, clean unleaded gasoline.
DO NOT USE PREMIUM GASOLINE. BE CAREFUL
NOT TO OVERFILL TANK.
WARNING: Experience indicates that alcohol blended
fuels (called gasohol or using ethanol or methanol) can
attract moisture which leads to separation and formation of
acids during storage. Acidic gas can damage the fuel
system of an engine while in storage.
To avoid engine problems, the fuel system should be
emptied before storage for 30 days or longer. Drain the gas
tank, start the engine and let it run until the fuel lines and
carburetor are empty. Use fresh fuel next season. See
Storage instructions for additional information.
Never use engine or carburetor cleaner products in the fuel
tank or permanent damage may occur.
TO START ENGINE
°To start a cold engine, push primer five (5) times
before trying to start. Use a firm push. This step is not
usually necessary when starting an engine which has
atready run for a few minutes.
o Hold operator presence control bar down to the handte
and putt starter handle quickly. DO NOT allow starter
rope to snap back.
o To STOP engine, release operator presence control
bar.
NOTE: In cooler weather it may be necessary to repeat
priming steps. In warmer weather over priming may cause
flooding and engine will not start, If you do flood engine,
wait a few minutes before attempting to start and DO NOT
repeat primintg steps.
GASOLINE FILLER CAP
ENGINE OIL CAP
W/DIPSTICK
FIG. 5
MOWING TiPS
•Under certain conditions, such as very tall grass, it may
be necessary to raise the height of cut to reduce
pushing effort and to keep from overloading the engine
and leaving clumps of grass clippings.
o For extremely heavy cutting, reduce the width of cut
and raise the rear of the lawn mower housing one (1)
wheel adjuster setting higher than the front for better
discharge of grass.
• For side discharge mowers, cutting in a counter-clock
wise direction, starting at the outside of the area to b_.
cut, spreads grass clippings more evenly and puts less
load on the engine. To keep clippings off of walkways,
flower beds, etc., make the first cuts in a clockwise
direction.
, Keep top of engine around starter clear and clean of
grass clippings and chaff. This wilt help engine air flow
and extend engine life.
8

NTENANCE
MAINTENANCE
FILL IN DATES
AS YOU COMPLETE
REGULAR SERVICE
Check for Loose Fasteners
Clean/Inspect Grass Catcher
CIean Lawn Mower
Inspect Mower Blade
Replace/Sharpen Mower Blade
Lubricate Pivot Points
Check Engir_e Oil Level
Change Engine Oil
inspect Muffler
Replace Spark Plug
Replace Air Filter Paper Cartridge
SERVICE DATES
L_ .........
/I !i ....................
1 - Change more often when operating under a heavy load or in high ambient temperatures.
2 - Service more often when operating in dirty or dusty conditions,
3- Replace blades more often when mowing in sandy soil, LUBRlCAT!0 N CHART
GENERAL RECOMMENDATIONS
The warranty on this lawn mower does not cover items that
have been subjected to operator abuse or negligence. To
recieve fullvatue from the warranty, operator must maintain
mower as instructed in this manual.
Some adjustments will need to be made periodically to
properly maintain your unit.
All adjustments in the Service and Adjustments section of
this manual should be checked at least once each season.
o Once a year, repiace the spark plug, clean or replace
air filter element and check blade for wear. A new spark
plug and clean/new air fitter element assures proper
air-fuel mixture and helps your engine run better and
last longer,
o Follow the maintenance schedule in this manual.
BEFORE EACH USE
o Check engine oil fevet,
• Check for loose fasteners.
LUBRmCAT_ON
Keep unit wett lubricated (See "LUBRICATION CHART").
(_) ENGINE (_ WHEEL
ADJUSTER
(_ HANDLE BRACKET
MOUNTING PiN (_) DISCHARGE
GUARD
HINGE PIN
(_ SPRAY LUBRICANT
(_) SAE30 OR10W30MOTOROIL REFERTO ENGINEMAINTENANCE
SECTIONo
_MPORTANT: DO NOT OIL OR GREASE PLASTIC WHEEL
BEARINGS. VISCOUS LUBRICANTS WILL ATTRACT
DUST AND DiRT THAT WILL SHORTEN THE LIFE OF
THE SELF LUBRICATING BEAR] NGS. IF YOU FEEL THEY
MUST BE LUBRICATED, USE ONLYA DRY, POWDERED
GRAPHITE TYPE LUBRICANT SPARINGLY.
9

NTENANCE
LAWN MOWER
Always observe safety rules when performing any mainte-
nance,
T_RES
o Keep tires free of gasoline, oil, or insect control chemi-
cals which can harm rubber.
o Avoid stumps, stones, deep ruts, sharp objects and
other hazards that may cause tire damage.
BLADE CARE
For best results, mower blade must be kept sharp. Replace
bent or damaged blades.
TO REMOVE BLADE (See Fig. 6)
o Turn lawn mower on its side. Make sure air filter and
carburetor are up.
o Use a wood block between blade and mower housing
to prevent blade from turning when removing blade
bolt,
. Protect your hands with gloves and/or wrap blade with
heavy cloth,
. Remove blade bolt by turning counter-clockwise, Use
a 9/t6" box or open-end wrench.
• Remove blade and attaching hardware (bolt, lock
washer and hardened washer).
NOTE: Remove the blade adapter and check the key
inside hub of blade adapter. The key must be in good
condition to work properly. Replace adapter if damaged.
TO REPLACE BLADE (See Fig. 6)
•Position the blade adapter on the engine crankshaft,
Be sure key in adapter and keyway in crankshaft are
aligned,
• Position blade on the blade adapter aligning the two (2)
holes in the blade with the raised lugs on the adapter.
oBe sure the word TOP (stamped on the blade) is toward
the engine.
o Install the blade bolt with the lock washer and hardened
washer into blade adapter and crankshaft,
o Use block of wood between blade and lawn mower
housing and tighten the blade bolt, turning clockwise.
o The recommended tightening torque is 35-40 ft, Ibs,
iMPORTANT: BLADE BOLT ISGRADE 8 HEATTREATED.
_T'ON_ A 'DOS. b,_de can b_ dan- _
gerous. /
Use only Sears authorized replacement blade to get the
best cutting results,
NOTE: We do not recommend sharpening blade -but if
you do, be sure the blade is balanced,
TO SHARPEN BLADE
o "Theblade can be sharpened with a fife or on a grinding
whee!, Do not attempt to sharpen while on the mower,
"To check blade balance, drive a nail intoa beam or wall,
Leave about one inch of the straight nail exposed.
Place center hole of blade over the head of the nail. If
blade is balanced, it should remain in a horizontal
position. If either end of the blade moves downward,
sharpen the heavy end until the blade is balanced,
CRANK-
SHAFT &
BLADE
ADAPTER
DETAIL BLADE
ADAPTER
KEY
CRAN_
SHAFT
KEYWAY LOCK WASHER
CRANK-
SHAFT
BLADE ADAPTER
FIG, 6
GEAR CASE
.To keep your drive system working properly, the gear
case and area around the drive should be kept clean
and free of trash build-up. Clean under the drive cover
twice a season,
oThe gear case isfilled with lubricant to the proper level
at the factory. The onty time the lubricant needs
attention is if service has been performed on the gear
case,
• If lubricant is required, use only Texaco Starpfex Pre-
mium Grease, part no. 750355, Do not substitute,
DRIVE WHEELS
Check front drive wheels each time before you mow to be
sure they move freely,
The wheels not turning freely means trash, grass cuttings,
etc, are in the drive wheel area and must be cleaned to free
drive wheels.
If necessary to clean the drive wheels, check both front
wheels,
• Remove hubcaps, hairpin cotters and washers.
• Remove wheels from wheet adjusters,
•Remove any trash or grass cuttings from inside the
dust cover, pinion and/or drive wheel gear teeth.
• Put wheels back in place,
, if after cleaning, the drive wheels do not turn freely,
contact your nearest Sears Service Center.
GRASS CATCHER
(If purchased as an accessory)
o The grass catcher may be hosed with water, but must
be dry when used,
.Check your grass catcher often for damage or deterio-
ration, Through normal use it will wear, if catcher
needs replacing, replace only with a manufacturer,
approved replacement catcher from Sears, Give the
lawn mower model number when ordering,
10

NTENANCE
ENGINE
LUBRiCATiON
Change the oil after the first two hours of operation and
every 25 hours thereafter or at least once a year ifthe lawn
mower is not used for 25 hours in one year.
Check the crankcase oil leve! before starting the engine
and after each five (5) hours of continuous use. Add SAE
30 motor oil or equivalent, Tighten oil plug securely each
time you check the oil level,
TO CHANGE ENGINE OIL (See Fig. 7)
= Remove engine oil cap; }ay aside on a clean surface.
=Tip lawn mower on its side and drain oil intoa suitable
container. Rock lawn mower back and forth to remove
any oil trapped inside of engine.
,Wipe off any spilled oil on lawn mower and on side of
engine,
° Fill engine with SAE 30 or 10W 30 oil. Fill only to the
"FULL" line on the dipstick. DO NOT OVERFILL.
• Replace engine oit cap.
AiR FILTER
Your engine will not run properly and may be damaged by
using a dirty air filter.
Replace the air filter every year, more often if you mow in
very dusty, dirty conditions, Do not wash air filter,
TO CHANGE AIR FILTER (See Fig, 8)
• Remove the air filter byturning counterclockwise to the
stop and pull away from collar.
o Remove filter from inside of cover.
• Clean the inside of the cover and the collar to remove
any dirt accumulation.
• Insert new filter into cover.
oPut air filter cover and filter into collar aligning the tab
with the slot.
• Push in on cover and turn clockwise to tighten.
MUFFLER
Inspect and replace corroded muffler as it could create a
fire hazard and/or damage.
SPARK PLUG
Change your spark plug each year to make your engine
start easier and run better. Set spark plug gap at .030 inch,
FIG, 7
COLLAR
TURN
COUNTER-
CLOCKWISE
)REMOVE
AIRFILTER TURN CLOCKWISE
TO TIGHTEN
AiR FILTER COVER
FiG, 8
CLEANING
Clean the underside of your mower after each use.
, Turn lawn mower on its side.Make sure air filter and
carburetor are up. Clean the underside of your iawn
mower by scraping to remove build-up of grass and
trash.
• Ciean engine often to keep trash from accumulating. A
clogged engine runs hotter and shortens engine life.
o Keep finished surfaces and wheels free of all gasoline,
oil,etc.
• We DO NOT recommend using a garden hose to clean
lawn mower unless the electrical system, muffler, air
filter and carburetor are covered to keep water out.
Water in engine can result is shortening engine life.
CLEAN UNDER DRIVE COVER
Clean under drive cover at least twice a season, Scrape
underside ofcover with putty knife or similar too! to remove
any build-up of trash or grass on underside of drive cover,
11

SERVICE AND ADJUST ENTS
CAUTION: BEFORE PERFORMING ANY SERVICE OR ADJUSTMENTS:
oRelease control bar.
, Make sure the blade and all moving parts have completely stopped.
o Disconnect spark plug wire from spark plug and place where it cannot come in contact with plug.
LAWN MOWER
TO ADJUST CUTTING HEIGHT
See "TO ADJUST CUTTING HEIGHT" in the Operation
section of this manual.
DISCHARGE GUARD
The discharge guard, attached to the discharge opening of
your lawn mower, is provided to prevent the possibility of
injury resulting from objects being thrown out of the dis-
charge opening into the operator mowing position. If the
discharge guard becomes damaged, itshould be replaced.
TO REMOVE!REPLACE DRIVE BELT
(See Fig. 9)
° Remove drive cover, Remove belt by pushing down
on gear case pulley.
o Turn lawn mower on its side with carburetor and fue!
cap up.
o Loosen hex head screw and move belt snubber away
from pulley,
, Remove belt from engine pulley on crankshaft and
carefully slip belt off over blade,
° CAUTION: Sharp edges of blade can cut belt.
°Install new belt by reversing above steps.
• Move belt snubber back in place and tighten hex head
sc rew.
NOTE: Belt snubber clears belt by approx. 1/32 inch when
installed.
, Always use factory approved belt to assure fit and
long life.
TO ADJUST DRIVE CONTROL CABLE
(See Fig. 10)
A drive control cable that needs adjustment wili keep your
lawn mower from self-propelling properly and can also
cause gear case components to wear out sooner.
o Remove drive cover.
oLoosen cable clamp screw "A" and nuts "B" and "C".
oHold down operator presence control bar to handle
and engage drive control.
• Move shifter arm to drive position while rotating front
wheefsto be sure jaw clutch is engaged. Pull threaded
sleeve with pliers. Do not putt on control cable,
, Tighten nut "C" until sleeve is snug.
, Tighten screw"A" and nut "B".
oPush lawn mower back and forth to be sure gear case
is engaged,
o Replace drive cover.
o Release operator presence control bar. 12
HEX HEAD SCREW
BELT
SNUBBER
W"
/ [,
/
FiG. 9
PLIERS
JAM
JAM NUT "B",,_
DRIVE
POSITION
SHIFTER
ARM
SLEEVE
CLAMP
CLUTCH
SPRING SCREW "A" ADJUSTING
BRACKET
FIG. 10

SF_.RVIOF_.
AND ADJUST ENTS
TO ADJUST HANDLE (See Figs. tl Thru 13)
Your lawn mower handle can be raised or lowered for your
mowing comfort. Four (4) positions are available: high,
medium high, medium low and low. Handles are shipped
mounted in the medium low position.
• To change from medium low to medium high position,
the upper and lower handle sections will have to be
turned over (See Fig. 11B).
• Remove the controls and operator presence control
bar from the upper handle.
,Remove the starter rope guide from the lower handle.
Remove hairpin cotters,
• Disconnect the lower handle from the handle brackets
(See Fig. t3).
, Turn the handle over and reassemble the hairpin
cotters that have been removed.
, Reassemble the starter rope guide.
• Reassemble the controls and the operator presence
control bar to the upper handle.
CAUTION: The operator presence
contro! bar must pivot freely to permit
blade brake engagement when control
bar is released. Do not overtighten the
fasteners holding the controts to the
upper handle.
,To change from medium low to high position only the
upper handle section will have to be turned over (See
Fig, 12A).
• To change from medium low to low position, only the
lower handle section wilt have to be turned over (See
Fig. 12B).
ENGINE
ENGINE SPEED
Your engine speed has been factory set. Do not attempt to
increase engine speed or it may result in personal injury. If
you believe that engine is running too fast or too slow, take
your mower to an authorized Sears Service Center for
repair and adjustment.
CARBURETOR
Your carburetor has been preset at the factory and is not
adjustable.
SHIPPING POSITION
MEDIUM LOW MEDWM HBGH
\
FIG. ! 1A FIG, 11B
HIGH
LOW
FIG. 12A FiG. 12B
\LOWER HANDLE
HAIRPIN CLiP
JI
FIG. 13
13

STORAGE
immediately prepare your iawn mower for storage at the
end of the season or if the unit wit not be used for 30 days
or more.
LAWN MOWER
When lawn mower is to be stored for a period of time, clean
it thoroughly, remove all dirt, grease, leaves, etc. Give
blade and underside of housing a good coat of grease or
rust preventative. Store in a clean, dry area.
•Clean entire lawn mower (See "CLEANING" in the
Maintenance section ol this manual).
, Lubricate as shown in the Maintenance section of this
manuaJ.
o Be sure that a/ nuts, bolts, screws, and pins are
secu_'elyfastened. Inspect moving parts for damage,
breakage and wear. Replace if necessary.
o Touch up a!l rusted or chipped paint surfaces; sand
lightly before painting.
HANDLE (See Fig, 14)
o You can fold your lawn mower handle for storage.
° To fold, squeeze the bottom ends ofthe lower handle
toward each other until the tower handle clears the
handle bracket, then move handle forward.
IMPORTANT: WHEN FOLDING THE HANDLE FOR
STORAGE OR TRANSPORTATION, BE SURE TO FOLD
THE HANDLE AS SHOWN tN FIG. t4. IF YOU FOLD THE
UPPER HANDLE SECTION THE WRONG WAY, YOU
MAY DAMAGff THff CONTROL CABLES.
o When setting up your handle from the storage position,
the lower handle wll automatically lock into the mow-
ing position.
ENGINE
FUEL SYSTEM
iMPORTANT: IT IS iMPORTANT TO PREVENT GUM
DEPOSITS FROM FORMING iN ESSENTIAL FUEL
SYSTEM PARTS SUCH AS CARBURETOR, FUEL FILTER,
FUEL HOSE, OR TANK DURING STORAGE. ALSO,
EXPERIENCE INDICATES THAT ALCOHOL BLENDED
FUELS (CALLED GASOHOL OR USING ETHANOL OR
METHANOL) CAN ATTRACT MOISTURE WHICH LEADS
TO SEPARATION AND FORMATION OF ACIDS DURING
STORAGE. ACIDIC GAS CAN DAMAGE THE FUEL
SYSTEM OF AN ENGINE WHILE IN STORAGE.
o Drain the fuel tank.
• Start the engine and let it run untt the fuel lnes and
carburetor are empty.
o Never use engine or carburetor cleaner products in the
fuel tank or permanent damage may occur.
• Use fresh fuet next season.
NOTE: Fuel stabilizer is an acceptabIe alternative in
minimizing the formation of fuel gum deposits during stor-
age. Add stabiizer to gasoline in fuel tank or storage
container. Always fo/ow the mix ratio found on stabilizer
container. Run engine at least 10 minutes after adding
stabilizer to allow the stabilizer to reach the carburetor. Do
not drain the gas tank and carburetor if using fuel stabilizer.
ENGINE OIL
LOWER HANDLE
OPERATOR PR F..SIINCE
CONTROL BAR --_-_-_-_ .
UF'PE_NANDL,_.._/ ,/ ]_
// ,4
oLo o=w,,°o .,
FORSTORAGE _x " ;,'_'_'._¢/
i_-_2_::_ /,,," FOLO BACKWARD
_i]!_ #OWING
Low_ _,N_L_
Drain oil (with engine warm) and replace with clean engine
oil. (See "ENGINE" in the Maintenance section of this
manual).
CYUN DER
o Remove spark plug.
•Pour one ounce (29 m!) of oil through spark plug hole
into cylinder.
• Pull starter handle slowly a few times to distribute oil.
o Replace with new spark plug.
OTHER
• Do not store gasoline from one season to another.
• Replace your gasoline c&n if your can starts to rust.
Rust and/or dirt in your gasoline will cause problems.
If possible, store your unit indoors and cover it to give
protection from dust and dirt.
° Cover your unit with a suitable protective cover that
does not retain moisture. Do not use plastic. Plastic
cannot breathe which allows condensation to form and
will cause your unit to rust.
ilIIPORTANT: NEVER COVER MOWER WHILE ENGINE
AND EXHAUST AREAS ARE ST_LL WARM.
CAUTtON: Never storethe lawn mower
wlh gasol_e in the tank i_side a buld-
ing where fumes may reach an open
flame orspark. Alowtheengineto coo_
before storing in any enclosure.
FIG, !4
14

22" POWER- PROPELLED
LAWN MOWER 917.378170
GSAR CASE ASSEMBLY PART NUMBER 751001
REPAIR PARTS
\
RE;F, PART
NO, NO,
1 53838
2 85178
3 88386
4 57072
5 57388
6 48032
7 77881
8 77039
9 750430
t0 57079
1t 75144
12 87822
DESCRIPTION
Keps Locknut t/4-20
Adjusting Bracket
Shifter Assembly
Seal
Grooved Pin 1/8 x 1/2
Gear Case Halves (fnct. Upper &
Lower Halves) (Incl, Ref, 4, 5, 7)
Bearing
Spring Bracket
Drive Shaft
Hardened Washer
Yoke Clutch
Grooved Pin 1/8 x 3/4
REFo PART
NO, NO,
!3 86447
t4 83659
t5 750436
16 750355
17 STD581050
18 850848
19 83720
20 65692
21 83680
22 STD522512
DESCRIPTION
Plug
Hetical Gear
Jaw Clutch
Grease
E_Ring
Hi-Pro Key
Worm Shaft
Woodruff Key #3
Worm
Hex Head Machine Screw 1/4-20 x
!-t/4
• •iz
15

REPAIR PARTS
CRAFTSMAN 22" ROTARY LAWN MOWER = MODEL NO, 917o378170
t,(

REPAIR PARTS
CRAFTSMAN 22" ROTARY LAWN MOWER .. MODEL NO, 917.378170
,,4
KEY PART DESCRiPTiON
NO. NO.
1 850991X479 Upper Handle
2STD541425 Locknut
385!667 Remote Throttle Control
4 86960 Wheel Bushing
5 103672X Rope Guide
7 58714 Handle Bolt
8 85827 Cable Clip
9 51793 Hair_in Cotter
10 63688 Hanule Knob
11 STD54t425 Locknut
12 84876X479 Lower Handle
t3 53109 Hex Head Bolt t/4-20 x !-!/2
!8 63845)(417 Handle Bracket Assembly (Left)
19 83644X417 Handle Bracket Assembly (Right)
22 128797 Rear Deflector
23 750097 Hex Washer Head Screw #10-24 x !/2
24 87584X004 Deflector Bracket
25 750149 Discharge Guard
28 STD581025 E-Ring
27 87590 Hinge Rod
28 87593 Housing Bracket
29 87589 Torsion Spdng
33 77400 Hubcap
34 85! 79 Retainer Clip
35 850955 Wheel Adjusting Bracket
36 84920 Spacer
38 850855X004 Selector Spring
39 87877 Selector Knob
KEY PART
NO. NO.
40 85021X004
4! 62335
42 84921
43 87748
44 52160
45 751592
46 85483
47 59289
48 55187
49 STD541425
50 85t201X004
5t 85100O
52 850998
53 851084
54 850263
55 85t 074
56 850973
57 851514
59 87587X479
60 88404>(479
62 48! 92
63 85543
64 87677
68 t32423
132421
DESCRIPTION
Axle Arm Assembly
Belleville Washer
Shoulder Bolt
Wheel & Tire Assembly
Washer
Locknut 3/18-! 6
Danger Deca_
Flat Washer
Thread Cutting Screw 5/16-18 x 3/4
Locknut
Washer
Belt Snubber
Hex Head Thread Roiling Screw 3/8o 16 x 1-1/8
Hex Head Screw 3/8-24 x 1-3/8 (Grd° 8)
Helical Lockwasher
Hardened Washer
Blade 22"
Blade Adapter
Front Baffle
Rear Baffle (Not Shown)
Lawn Mower Housing (#_cl. Refo #46, 59 & 80)
Engine Pulley
Hi-Pro Key #HP 505
Engine - Craftsman Model No. 143.424072
Owner's Manual
Available accessories not inciuded with lawn mower:
71 33072
7! 33623
7133500
7133300
7t 33201
711_33722
Grass Catcher
Gas Can (2,5 ga!.)
Fue! Stabilizer
SAE 30W Oil (20 oz.)
Mt_lcher Kit
High WheeJ Kit

REPAIR PARTS
CRAFTSMAN 22" ROTARY LAWN MOWER =MODEL NO. 917.378170

REPAIR PARTS
CRAFTSMAN 22" ROTARY LAWN MOWER - MODEL NO. 917.378170
KEY PART DESCRiPTiON
NO. NO.
1 851509 Control Bar
2STD541425 Locknut 1/4-20
3 48029 Control Head K_t
4750029 Screw #10 x20 x2
5 133049 Control Cable Assembly
683691 V-Belt
7 750097 Hex Washer Head Screw #10-24 x 1/2
8 87930 Clip Guide (Housing)
9 54338 He× Head Bolt 1/4-20 x 2-3/4
10 61528 Flat Head Machine Screw 1/4-20 x 3/4
11 STD582087 Retaining Ring
12 74!89 Locknut #t0-24
13 850922 Wheel Adjusting Bracket
!4 88284X004 Axle Arm Assembly
15 87877 Selector Knob
16 8510!9X004 Selector Spring (Left)
17 851021X004 Selector Spring (Right)
18 85! 226 Washer
19 86274 Belleville Washer
20 86273 Bearing Spacer
21 76401 Dust Cover
22 74507 -Pinion
23 STD581050 E-Ring
KEY PART
NO. NO.
24 87729
25 86960
26 52160
27 85179
28 77400
29 132333
30 87866
31 750097
32 750293
33 750108
34 83700
35 48269
36 STD582043
37 83681
38 STD580009
39 75192
40 STD580014
41 83632
42 751001
43 48175
44 48174
45 86012
46 851552
DESCRiPTiON
Wheel & Tire Assembly 8.00 x 1.75
Wheel Bushing
Flat Washer
Retainer Clip
Hubcap
Drive Cover Decal
Pan Head Tapping Screw #10-24 x2 3/4
Hex Washer Head Screw #10-24 x 1/2
Drive Cover
Hex Washer Head Screw #10.24 x 3/8
Cable Clamp
Drive Control Cable Kit
Retaining Ring
Drive Pulley
Woodruff Key #213
Spring
Woodruff Key #3
Spring
Gear Case Assembly (Complete)
Wheel Adjuster Assembly (Left)
Wheel Adjuster Assembly (Right)
Drive Shaft Cover
Pan Head Hi Lo Screw #10-!6 x .63

CRAFTSMAN 4oCYCLE ENGINE MODELNUMBER1,)3.424072
20