Craftsman 917.378590 User manual

SEARS
/:RBFTZ
MODEL NUMBER 917.378590 OWNER'S MANUAL
®
oAssembly
• Operation
• Customer
Responsibilities
• Service
,,,--t _,,d,__.d ,tj d,d d d_,,,.*t d L,w,,,_
•Repair Parts
Caution:
Read and Follow
all Safety Rules
and Instructions
Before Operating
This Equipment
Iilllllllll III II
I IIIIIIIIIIII
I

SAFETY RULES
CAUTION:ALWAYSDISCONNECTSPARKPLUGWIREANDPLACEWIREWHEREITCANNOTCONTACTSPARK
PLUGTO PREVENTACCIDENTALSTARTINGWHEN SETTINGUP,TRANSPORTING,ADJUSTING ORMAKING
REPAIRS IMPORTANT
SAFETY STANDARDS REQUIRE OPERATOR PRESENCECONTROLSTO MINIMIZETHE RISK OF INJURY. YOURUNIT ISEQUIPPED WITH
SUCH CONTROLS. DO NOT ATTEMPT TO DEFEAT THE FUNCTIONOF THE OPERATORPRESENCE CONTROLS UNDER ANY CIRCUM-
STANCES.
TRAINING:
• Read-this operator's manual carefully.. Become familiarwith
the controls and know how to operate your mower properly.
Learn how to quickly stop mower.
•Do not allow children to use your mower. Never allow adults
to use mower without proper instructions.
•Keep the area of operation clear of all persons, especially
small children and pets.
•Use mower only as the manufacturer intended and as de-
scribed in this manual.
-Do not operate mower if it has been dropped or damaged in
any manner. Always have damage repaired before using
your mower.
• Do not use accessory attachments that are not recommended
by the manufacturer. Use of such attachments may be
hazardous_
The blade turns when the engine is running.
PREPARATION:
•Always thoroughlycheck the area to be mowed and clear it of
all stones, sticks, wires, bones, and other foreign objects.
These objects will 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 +_nkbefore startina engine. Oo not fitf _.as t_nk
Allow the engine to cool for several minutes before filling the
gas tank. Clean off any spilled gasoline before starting 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.
• Do not mow wet or slippery grass. Never run while operating
your mower. Always be sure of your footing -keep a firmhold
on the handles and walk.
Do not put hands or feet near or under rotating parts. Keep
clear of the discharge opening at alf times.
Always step the engine whenever you leave or are not using
your mowe r,orbefore crossing driveways, walks, roads, and
any gravel-covered 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 discon nect the spa rkplug
wire and keep it away from the spark plug to prevent
accidental starting.
• Do not continue to run you rmower if you hit aforeign object.
Follow 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 itvibrates abnormally. Exces-
sive vibration is an indication of damage; stop the engine,
safely check forthe cause ofvibration and repair as required.
•Do not run the engine indoors. Exhaust fumes are danger-
ous.
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 blaae and the engine mounting bolts often to be
sure they are tightened properly.
•Check all bolts, nuts and screws at frequent intervals for
proper tightness to be sure mower is insafe working condi-
tion.
Keep all safety devices in place and working.
To reduce fire hazard, keep the engine free of grass, leaves
or excessive grease and oil.
• Check grass catcher often for deterioration and wear and
replace worn bags. Use only replacement bags that are
recommended by and comply with specifications of the
manufacturer of your mower.
• Always keep a sharp blade on your mower.
• Allow engine to coot before storing in any enclosure.
• Never store mower with fuel in the tank inside a building
where fumes may reach an open flame or an ignitionsource
such as a hot water heater, space heater, clothes dryer, etc.
LOOK FOR THIS SYMBOL TO POINT OUT IMPORTANT SAFETY PRECAUTIONS.
IT MEANS - ATTENTION!!! BECOME ALERT!!! YOUR SAFETY IS INVOLVED.
2I

CONGRATULATIONS on your purchase ofa Sears Lawn
Mower. It has been designed, engineered and manufac-
tured to give you the best possible dependability and
performance.
Should you experience any problem you cannot easily
remedy, please contact your nearest Sears Authorized
Service Center/Department. We have competent, well-
trained technicians and the proper tools to service or repair
this lawn mower.
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 917.378590
SERIAL
NUMBER
DATEOFPURCHASE
THE MODELAND SERIAL NUMBERSWtLL BE FOUND
ON A DECAL A-I-rACHED TO THE REAR OF THE
LAWN MOWER HOUSING
YOUSHOULDRECORDBOTHSERIALNUMBERAND
DATE OF PURCHASE AND KEEP IN A SAFE PLACE
FOR FUTURE REFERENCE.
PRODUCT SPECIFICATIONS
HORSEPOWER: 5.5
DISPLACEMENT: 9.0 CU.IN.
GASOLINECAPACITY 1.6 QUARTS
ANDTYPE: UNLEADEDREGULAR
OILTYPE(APFSG): SAE 30 (ABOVE32°F)
SAE 5W-30(below 32°F)
OIL CAPACITY: 20 OZS.
SPARKPLUG: CHAMPION RJ19-LM
(GAP: .030") STD361458
VALVECLEARANCE: INTAKE: .008"
EXHAUST: .008"
SOLID STATE IGNITION
AIRGAP: .0125IN.
BLADEBOLTTORQUE: 35-40 FT.LBS.
MAINTENANCE AGREEMENT
A Sears Maintenance Agreement is available on this product. Contact your nearest Sears store for details.
CUSTOMER RESPONSIBILITIES
• Read and observe the safety rules.
•Follow a regular schedule in maintaining, caring for and using your lawn mower.
• Follow the instructions under "Customer Responsibilities" and "Storage" sections of this owner's manual.
LIMITED TWO YEAR WARRANTY ON CRAFTSMAN POWER MOWER
For two years 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 will 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 INTHE UNITED STATES. THIS WARRANTY APPLIES ONLYWHILE
THIS PRODUCT IS 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/817 WA, HOFFMAN ESTATES, ILLINOIS 60179
3

i |l .,i i
TABLE OF CONTENTS
SAFETY RULES ............................................................ 2
PRODUCT SPECIFICATIONS ....................................... 3
CUSTOMER RESPONSIBILITIES ....................... 3, 9-11
WARRANTY ................................................................... 3
ASSEMBLY ................................................................... 5
OPERATION .................................................................. 6
MAINTENANCE SCHEDULE ........................................ 9
SERVICE AND ADJUSTMENTS ................................. 12
STORAGE .................................................................... 15
TROUBLESHOOTING ................................................. 27
REPAIR PARTS- LAWN MOWER ........................ 16-20
REPAIR PARTS- ENGINE .................................... 21-26
PARTS ORDERING/SERVICE ................ BACK COVER
INDEX A
Accessories ..................................... 5
Adjustments:
Carburetor .............................. 14
Drive Control Cable ................ 12
Engine Speed ......................... 14
Handle Height ......................... 13
Height of Cut ............................. 7
Air Filter:
Replacement .......................... 11
Service .................................... 11
Assembly ......................................... 5
B
Blade:
Sharpening ............................. 10
Replacement .......................... 10
C
Controls:
Drive Control ............................. 6
Engine Zone Control ................. 6
Engine Speed Control .............. 6
Operator Presence
Control Bar ............................... 6
Customer Responsibilities.....3, 9-11
Air Filter .................................. 11
Blade Care/Replacement ....... 10
DriveWheels .......................... 10
Engine .................................... 11
Lubrication.............................. 11
Spark Plug .............................. 11
Cutting Levels ................................. 7
E
Engine:
Air Filter .................................. 11
Oil Change .............................. 12
Oil Level .................................. 12
Oil Type .................................. 12
Starting ..................................... 8
Stopping ................................... 8
Storage ................................... 15
F
Fuel:
Capacity .................................... 3
Storage ................................... 15
Type .......................................... 8
H
Handle Adjustment:
Assembly .................................. 5
Cutting Height ........................... 7
L
Lubrication:
Engine .................................... 11
Lawn Mower ............................. 9
M
Maintenance Agreement ................. 3
Maintenance Schedule ................... 9
Mowing Tips .................................... 8
Oil: O
Engine .................................... 11
Storage ................................... 15
Operation:
Drive Control ............................. 7
Engine Control .......................... 7
Grass Catcher ........................ 10
Mower ....................................... 7
Operator Presence
Control Bar ............................... 7
Options:
Accessories .............................. 5
R
Repair Parts:
Engine ............................... 21-26
Lawn Mower ...................... 16-20
Responsibilities, Customer ....3, 9-11
s
Safety Rules .................................... 2
Service and Adjustments .............. 12
Carburetor .............................. 14
DischargeGuard .................... 12
Drive Belt ................................ 12
Engine Speed ......................... 14
Handle .................................... 13
Spark Plug..................................... 11
Specifications.................................. 3
Speed Control:
Engine .................................... 14
Starting the Engine .......................... 8
Stopping the Engine ........................ 8
Storage .......................................... 15
T
Trouble Shooting Chart ................. 27
W
Warranty .......................................... 3
4

LAWN MOWER RIES
II I II I I IIIII III II I I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII I I I I I
These accessories were available when thislawnmower was produced. They are also available at most Sears retail outlets
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.
ENGINE
SPARK PLUG MUFFLER AIR FILTER GAS CAN ENGINE OIL STABILIZER
LAWN MOWER PERFORMANCE ...... •......... •I• iiii ii ii i IIHI,I Illll
MULCHER KIT
LAWN MOWER MAINTENANCE i
BELT BLADE WHEELS
.......... EMBLY
=llIHH I HJ==| Hm|HH I lll l IH II I I
Read these instructions and this :manual in its entirety _PPERATOR PRESENCE
CONTROL BAR
before you attempt to assemble or operate your new lawn
mower. Your new lawn mower has been assembled at the
factory with the exception of those parts left unassembled
for shipping purposes. To ensure safe and proper opera-
tion of your lawn mower, all parts and hardware you
assemble must be tightened securely. Use the correct
tools as necessary to ensure proper tightness. All parts
such as nuts, washers, bolts, etc., necessary to complete
the assembly have been placed in the partsbag.
TO REMOVE LAWN MOWER FROM
CARTON
•Remove loose parts includedw!thmower.
•Cut down two end corners of carton and laYend panel
down flat. .....
•Remove all packing materials except padding between
upper and lower handle and padding holding opera*or
presence control bar to upper handle.
•Roll lawn mower out of carton and check carton thor-
oughly for additional loose parts. •
HOW TO SET UP YOUR LAWN
MOWER
LAWN MOWER
COVER
TO UNFOLD HANDLE (See Fig. 1)
IMPORTANT: UNFOLD HANDLE CAREFULLY SO AS
NOT TO PINCH OR DAMAGE CONTROL CABLES.
UPPER HANDLE
LIFT UP
MOWING POSITION
LOWER HANDLE
FIG. 1
Raise handles until lower handle section locks inte
place in mowing position.
Raise upper handle section into place on lower handle,
remove protective padding and tighten both handle
knobs.
•Remove handle padding holding operator presence
control bar to upper handle.
•Your lawn mower handle can be adjusted for your
mowing comfort. Refer to "Adjust Handle" in the
5Service and Adjustments section of this manual.

HHIHIIII,,II,IH,,,,,,IHII IHI I IIH,,,,,ll lllHlllHI I I
KNOW YOUR LAWN MOWER
READ THIS OWNER'S MANUAL AND SAFEr/RULES BEFORE OPERATING YOUR LAWN MOWER. Compare the
illustrations with your lawn mower to familiarize yourself with the location of various controls and adjustments. Save this
manual for future reference.
ZONE CONTROL CABLE
OPERATOR PRESENCE
CONTROL BAR
DRIVE CONTROL LEVER
STARTER HANDLE
HANDLE KNOB
GASOLINE RLL CAP,
ENGINE SPEED
CONTROL LEVER
,ENGINE OIL CAP WITH DIPSTICK
DRIVE COVER
: i¸
DISCHARGEGUARD
H
WHEEL ADJUSTER .... HOUSING
(ON EACH WHEEL)
FIG. 2
I II IIII mllllllil I I fl fl{fllfl
MEETS CPSC SAFETY REQUIREMENTS
Sears rotary walk-behindpowerlawnmowers conform to the safety standards ofthe 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.
STARTER HANDLE - usedfor starting the engine.
DRIVE CONTROL LEVER -used to engage power-pro-
pel!ed forward motion of lawn mower. ....
PRIMER - pumps additional fuel from the carburetor to the
cylinder for use when starting a cold engine.
ENGINE SPEED CONTROL LEVER -locatedon the side
of the engine which allows you to select either fast (_)or
slow (_) engine speed ..........
6

m,,HIHIIlll IIIllll III
ATION
HOW TO USE YOUR LAWN MOWER
ENGINE SPEED (See Fig. 3)
The engine speed iscontrolledbya lever locatedon the
side ofthe engine. Fast (_Bi)positionisfor startingengine,
normal cutting and better grass bagging. _Slow (-_m_)
positionis for light cuttingltr!mmingand fuel economy.
ENGINE ZONE CONTROL
lawn mower in order to minimize the
risk of blade contact injury. Do not
under any circumstances attempt to
defeat the function oftheoperator con-
trol. The blade turns when the engine is
running.
IIIIIIIUIIIII II IIIIIIIHIII I II I/ I I I IIIIIIII I II
• Your lawn mower isequipped with an operator pres-
ence control bar which requires the operator to be
positioned behind the lawnmower handle to start and
operate the lawn mower.
DRIVE CONTROL (See Fig. 4)
° Self-propelling is controlledby holding the operator
presence control bar down to the handle and pushing
the drive control lever forward until it clicks; then
release the lever.
•Forward motionwilistop when the operatorpresence
controlbar isreleased. To stopforward motionwithout
stopping engine,releasetheoperatorpresencecontrol
bar slightly untl the :drive control disengages. Hold
operator presence controlbar downto handle tocon-
tinue mowing withoutself-propelling, ':
•To keep drive controlengaged when turningcomers,
push down on handle and liftfront wheels off ground
whileturning lawn mower.
TO ADJUST CUTTING HEIGHT (See Fig. 5)
•Raise wheels for lowcutand lowerwheelsfor highcut.
•Wheels are set in lowcutfor shipping. Adjust cutting
height to suit your requirements. Medium position is
bestfor most lawns.
To change cutting height, squeeze adjuster lever to-
ward wheel. Move wheel up or down to suit your
requirements. Be sure all wheels are in the same
setting.
ENGINE SPEED CONTROL LEVER
lIVER
FIG. 3
OPERATOR PRESENCE
CONTROL BAR
CONTROL
TO ENGAGE DRIVE CONTROL
DRIVE CONTROL DISENGAGED
FIG. 4
LOWER WHEELS RAISE WHEELS
FOR HIGH CUT FOR LOW CUT
FIG. 5
7

BEFORE STARTING ENGINE
OIL (See Fig. 6)
Your lawn mower isshipped withoutoil inthe engine.
Be sure mower islevel and area around oilfill isclean.
oRemove engine oil cap w/dipstickand fillto the full line
on the dipstick.
• Use 20 ozs. of oi!. Fortypeandgradeofoiltouse, see
"ENGINE" in Customer Responsibilities section ofthis
manual.
• Pour oil slowly. Do not over fill.
• Check oil level before each use. Add oil if needed. Fill
to full line on dipstick.
• To read proper level, tighten engine oil cap each time.
• Reinstall engine oil cap and tighten.
= 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, 6)
• Fillgasolinetank withfresh, clean, unleadedgasoline.
DO NOT USE PREMIUM GASOLINE. BE CAREFUL
NOT TO OVER FILL TANK.
WARNING: Experience ndicates that alcohol blended
fuels (called gasohol or using ethanol or methanol) can
attractmoisturewhichleadsto separationand 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 shouldbe emptiedbefore stor-
age of 30 days or longer. Drain thefuel tank, start the
engine and let it run until fuel linesand carburetor are
empty. Use fresh fuel nextseason. See Storage Instruc-
tions for additional information. Never use engine or
carburetor cleaner products in fuel tank or permanent
damage may occur.
TO START ENGINE
To start a cold engine, push primer three (3) times
before tryingtostart. Use-.afirm push. Thisstep is not
usually necessary when startingan engine whichhas
already run for a few minutes.
Push engine speed controllever to fast (_) position.
Holdoperatorpresencecontrolbar downtothehandle
and pul!starter handle quickly. DO NOT allowstarter
rope tosnap back.
To STOP engine, release operator presence control
bar.
NOTE: In cooler weather it may be necessary to repeat
priming steps. Inwarmer 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 priming steps.
GASOLINE RLLER CAP ENGINE OIL CAP
W/DIPSTICK
FIG, 6
MOWING TIPS
•Undercertain conditions,suchas verytatt grass, itmay
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.
•For extremely heavy cutting, reduce the width ofcut by
overlapping previously cut path and mow slowly.
•For better grass bagging and most cutting conditions,
the engine speed should be set in the fast (_) position,
•For side discharge !awn mowers, cutting in a counter-
clockwise direction, starting at the outside of the area
to be cut, spreads grass clippings more evenly and
puts Iess load on the engine. To keep clippings off of
walkways, flower beds, etc., make the first cuts in a
clockwise direction.
•Pores incloth grass catcherscan become filled with dirt
and dust with use and catchers will collect less grass.
To prevent this, regularly hose catcher off with water
and let dry before using.
•Keep top of engine around starter clear and clean of
grass clippings and chaff. This will help engine airflow
and extend engine life.
8

iiiiilun,,,,,,,,iii BILITIES
I ilnlllll i iiiii ii ill iiiiiii iii iii iii i lJll iiiiii
MAINTENANCE SCHEDULE _ _ _ ___,,_o_ __ _O_
F,L,,NOATES
AS YOU COMPLETE
REGULAR SERVICE ............ E,,,,,,,,DATES
Check for,,Lo0se Fasteners b_'.... If
Clean/inspect Grass Catch'er(if Equipp.ed ) .. .. _ !_ if ....... tf ....
Clean Lawn Mower tk/ I_
Inspect!Clean 'D'rive"Wheels
(Self-Propelled Mowers) V'
RSharPen/aep.!ace.Mower Blade _S
Lubrication Chart V' If ......
.........Ci'ean BatterylRecharge'
(EIe.ct.r.!cStart Mowers) If t_4
E..Check Engine Oil Level :........ I ll/ ""
NChange Engine Oil .. tf I/1.2
GClean.....Air Filter V'2
I lnspec.t Muff!er ..... .V'.
NReplace spa.rk. P!ug ....... t/'
!E Replace Air Filter Paper,,Cartridge ........................................ I/'2 .. '....
1 - Change mere often when operating under a heavy load er in high ambient temperatures.
2 - Service more often when operatfng _n dirty or dusty conditions,
3 - Replace blades more often when mowfng in sandy soil.
4 - Charge 48 hours at end of season.
GENERAL RECOMMENDATIONS
The warranty on this lawn mower does not cover items that
have been subjected to operator abuse or negligence. To
receive full value 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.
• Once a year, replace the spark plug, clean or replace
air fiiterelement and checkblade forwear. A newspark
plug and clean/new air filter element assures proper
air-fuel mixture and helps your engine run better and
last longer.
• Follow the maintenance schedule in this manual.
BEFORE EACH USE
• Check engine oil level.
• Check for loose fasteners.
LUBRICATION
Keep unit well lubricated (See "LUBRICATION CHART!').
9
LUBRICATION CHART
(_) WHEEL
ADJUSTER !_ DISCHARGE
GUARD
HINGE PIN
/
(_ HANDLE BRACKET
MOUNTING PIN ENGINE OIL
(_) SPRAY LUBRICANT
(_ REFER TO CUSTOMER RESPONSIBILITIES "ENGINE"
SECTION,
IMPORTANT: DO NOT OIL OR GREASE PLASTIC WHEEL
BEARINGS. VISCOUS LUBRICANTS WILL ATTRACT
DUST AND DIRT THAT WtLL SHORTEN THE LIFE OF
THE SELF-LUBRICATING BEARINGS. IF YOU FEEL
THEY MUST BE LUBRICATED, USE ONLY A DRY,
POWERED GRAPHITE TYPE LUBRICANT SPARINGLY.

i,i iii i i ill,ll ,IIHII, ,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,, , ...................................
lUTIES
Ill ii I IIIIII II iii I I I ii iiiiii iii
LAWN MOWER
Always observe safety rules when performing any mainte-
nance.
TIRES
• Keep tires free of gasoline, oil, or insectcontrot chemi-
cals which can harm rubber.
• 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. Re-
place bent or damaged blades.
TO REMOVE BLADE (See Fig. 7)
•::Disconnect spark plug wire from spark plug and place
wire where it cannot come in contact with spark plug.
• Turn lawn mower on its side. Make sure air filter and
carburetor are up.
•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 9/16' 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. 7)
• Position the blade adapter on the engine crankshaft.
Be sure key in adapter and crankshaft keyway are
aligned.
• Position blade on the blade adapter aligning thetwo (2)
holes in the blade with the raised lugs on the adapter.
• Be sure the trailing edge of blade (opposite sharp
edge) is up toward the engine. ; :
•Install the blade bolt with the Iockwasher and hardened
washer into blade adapter and crankshaft.
• Use block of wood between blade and lawn mower
housing and tighten the blade bolt, turning clockwise.
°The recommended tightening torque is 35-40 ft. Ibs.
IMPORTANT: BLADEBOLT 1SGRADE 8 HEATTREATED.
NOTE: We do not recommend sharpening blade - but if
you do, be sure the blade is balanced.
TO SHARPEN BLADE
Care should be taken to keep the blade balanced. An
unbalanced blade will cause eventual damage to lawn
mower or engine.
• The bladecan be sharpened with afile or on agdnding
wheel. Do not attempt to sharpen whileonthe mower.
• To check blade balance, drive a nail into a beam or
:walt. Leave about one inch of the straight nail ex-
posed. 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.
BLADE
\
BLADE
ADAPTER
KEY
CRANK-
KEYWAY
"CRANK-
:SHAFT
TRAILING
LOCI( WASHER EDGE BLADE ADAPTER
FIG. 7
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 tofree
drive wheels.
If necessary to clean the ddve wheels, check both front
wheels.
• Remove hubcaps, hairpin cotters and washers.
• Remove wheels from wheel adjusters.
• Remove any trash or grass cuttings from inside the
dust cover, pinionand!or drive wheel gear teeth.
• Put wheels back in place.
•If after cleaning, the drive wheels do not turn freely,
contact your nearest authorized service center.
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.
• The gearcase isfilled with lubricantto the proper level
at the factory. The only time the lubricant needs
attention isif service has been performed on the gear
CaSe.
•If lubricantisrequired, useonly Texaco Starplex Pre-
mium 1 Grease, Part No. 750369. Do not substitute.
GRASS CATCHER
(If purchased as an accessory)
•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. Give the lawn mower
model number when ordering.
10

CUSTOMER R ES
ENGINE
LUBRICATION
Use only high quality detergent oil rated with API service
classification SG. Select the oil's SAE viscosity grade
according to your expected operating temperature.
SAE VISCOSITY GRADES
H
°F -_° 0o _° _s2L_, _0o 80.... 10oo
, , J
<'C -30_ -2_0° -I0_ O° I0_ 20_ 40•
TEMPERATURE RANGE ANTICIPkTED BEFORE NEXT OiL CH_GE
NOTE: Although multi-viscosity oils (5W30,1! 0W30 etc.)
improve starting incold weather, these multi-viscosityoils
will result in increased oil consumption when used above
32°F. Check your engine oil level more frequently to avoid
possible engine damage from running low on oil.
Changethe oil after the first two :hours of operation and
every 25 hours thereafter or atleast once a year if the lawn
mower is not used for 25 hours in one year.
Check the crankcase oil level before starting the engine
LIP
CARTRIDGE
FIG. 8
CONTAINER
BACK PLATE
TABS
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. 8)
NOTE: Before tipping lawn mower to drain oil, drain fuei
tank by running engine until fuel tank is empty.
•Disconnect spark plug wire from spark plug and place
wire where it cannot come in contact with spark plug.
•Remove engine oil cap; lay 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 oil. Fill only to the "FULL" line on the
dipstick. DO NOT OVER FILL.
• Replace engine oil cap.
-Reconnect spark plug wire to spark plug.
AIR FILTER
Your engine will not run properly and may be damaged by
using a dirty air fitter.
Replace the air filter every year, more often if you mow in
very dusty, dirty conditions.
TO SERVICE AIR FILTER (See Fig. 9)
•Loosen screw and tilt cover as shown.
•Carefully remove cartridge.
•Clean by tapping gently on a flat surface. If very dirty,
replace cartridge or clean as follows:
•Wash in a low or non-sudsing detergent and warm
water solution. Rinse thoroughly with flowing water
from mesh side until water runsclear, Let cartridge air
dry thoroughly before using.
CAUTION: Petroleum solvents, such
as kerosene, are not tobe used to clean
cartridge. They may cause deteriora-
tion of the cartridge. Do not oil car-
tridge, Do not use pressurized air to
clean or dry cartridge.
Install cartridge, then replace cover making sure the
tabs are aligned with the slots in back plate. Fasten
screw securely.
SCREW COVER
FIG. 9
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.
CLEANING
IMPORTANT: FOR BEST PERFORMANCE, KEEP
MOWER HOUSING FREE OF BUiLT-UP GRASS AND
TRASH. CLEAN THE UNDERSIDE OF YOUR MOWER
AFTER EACH USE.
CAUTION: Disconnect spark plug wire
from spark plug and place wire where it
cannot come in contact with the spark
plug.
Turn iawn mower on its side. Make sure air filter and
carburetor are up. Clean the underside of your }awn
mower by scraping to remove build-up of grass and
trash.
• Clean engine often to keep trash from accumulating. A
clogged engine runs hotter and shortens engine life.
•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 in shortened engine life.
CLEAN UNDER DRIVE COVER
Clean under drive cover at least twice a season. Scrape
underside of cover with putty knife or simitar tool to remove
any build-up of trash or grass on underside of drive cover.
11

SERVICE AND ADJUSTM
,i,, , ,, ,,,,i,iiii1,,i, iii , , ,i ,,11,1111,,111 ,,
CAUTION: BEFORE PERFORMING ANY SERVICE OR ADJUSTMENTS:
&_ elease control bar. _
Make sure the blade and all moving parts have completely stopped.
•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, tf the
discharge guard becomes damaged, itshould be replaced.
TO REMOVE/REPLACE DRIVE BELT
(See Fig. 10)
•Remove ddve cover. Remove be tby push ngdownon
gear case pulley.
•Turn lawn mower on its side with carburetor and fuel
cap up.
•Remove blade.
•Remove debris shield.
•Remove belt from engine pulley on crankshaft.
• Install new belt by reversing above steps.
•Always use factory approved belt to assure fit and long
life. ..... _
¸¸¸¸/::2¸i ¸¸ /
DRIVE
COVER _:: BELT
PRESS
FIG. 10
12

SERVICE AND ADJUSTMENTS
TO ADJUST HANDLE (See Figs. 11 Thru 13)
Your lawn mower handle can be raised or lowered for you r
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. 13).
° Turn the handle over and reassemble the hairpin
cotters that have been removed.
o
o
Reassemble the starter rope guide.
Reassemble the controls and the operator presence
control bar to the upper handle.
ill ill
iCAUTION: The operator presence con-
trol bar must pivot freely topermit blade
• • :brake engagement when control bar is
released. Do not overtighten the fas-
teners holding the controls to the up-
per 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 will have to be turned over (See
Fig. 12B).
SHIPPING POSITION
MEDIUM LOW MEDIUM HIGH
FIG. 11A FIG. 11B
GH
\
LOW
FIG. 12A FIG. 12B
\LOWER HANDLE
SQUEEZE
TO REMOVE
HAIRPIN COTTER HANDLE BRACKET
FIG. 13
13

SERVICE AND ADJUSTMENTS
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 service center for repair and
adjustment.
TO ADJUST CARBURETOR (See Fig. 14)
Minor carburetor adjustments may be required to compen-
sate for differences in fuel, temperature, altitude or load.
The air cleaner and air cleaner cover must be assembled
to carburetor when running.
INITIAL ADJUSTMENT-
With the engine not running, gently turn idle mixture screw
clockwise until it just closes. Screw may be damaged by
turning it in too far.
Next open the screw one turn counter-clockwise. This
initial adjustment will permit the engine to be started and
warmed up (approximately 5 minutes) pdor to final adjust-
ment,
NOTE: DO NOT adjusttop no load adjusting screw, tt was
pre-set at the factory,
FINAL ADJUSTMENT-
Place engine speed control leverin "IDLE" or"SLOW" (.il)
position. Adjust idle RPM by turning idle speed adjusting
screw to obtain 1700 RPM. Next, turn idle mixture screw in
(clockwise - lean mixture) until engine just starts to slow.
Then turn idle mixture screw out (counter-clockwise - rich
TOP NO
LOAD
SCREW
IDLE SPEED
ADJUSTING
SCREW
IDLE
MIXTURE
SCREW
FIG. 14
mixture) until engine runs unevenly. Now turn idle mixture
screw midway between rich and lean. Engine should
accelerate smoothly. If engine does not accelerate prop-
erly, the carburetor should be readjusted, usuallyto a richer
mixture, by turning the idle mixture screw counter-clock-
wise t/8 turn more.
IMPORTANT: NEVER TAMPER :WITH THE ; ENGINE
GOVERNOR, WHICH IS FACTORY SET FOR PROPER
ENGINE SPEED. OVERSPEEDING THE ENGINE ABOVE
THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. IFYOU THINK THE ENGINE-GOVERNED
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST AUTHORIZED SERVICE CENTER, WHICH HAS
PROPER EQUIPMENTAND EXPERIENCE TO MAKE ANY
NECESSARY ADJUSTMENTS.
14

ii iiiiiii iiii, iiiiiiiii i i iiiii1,1
STORAGE
Immediately prepare your lawn mower for storage at the
end of the season or if the unit will not be used for 30 days
or more.
LAWN MOWER
When lawn mower isto be stored for a period of time, clean
itthoroughly, remove all dirt, grease, leaves, etc. Store in
a clean, dry area.
• Clean entire lawn mower (See "CLEANING" in the
Customers Responsibilities section of this manual).
• Lubricate as shown in the Customers Responsibilities
section of this manual.
J Be sure that all nuts, bolts, screws, and pins are
securely fastened. Inspect moving parts for damage,
breakage and wear. Replace if necessary.
• Touch up all rusted or chipped paint surfaces; sand
lightly before painting,
HANDLE (See Fig. 15)
You can fold your lawn mower handle for storage.
• Squeeze the bottom ends of the lower handle toward
each other until the lower handle clears the handle
bracket, then move handle forward.
° Loosen upper handle mounting bolts enough to allow
upper handle to be folded back.
IMPORTANT: WHEN FOLDING THE HANDLE FOR
STORAGE OR TRANSPORTATION, BE SURE TO FOLD
THE HANDLE AS SHOWNOR YOU MAY DAMAGE THE
CONTROL CABLES. i
•When setting up your handle from the storage position,
the lower handle will automatically lock into the mowing
position.
ENGINE
FUEL SYSTEM
IMPORTANT: IT 1S IMPORTANT TO PREVENT GUM
DEPOSITS FROM FORMING IN ESSENTIAL FUEL
SYSTEM PARTS SUCHAS 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.
,Drain the fuel tank.
• Start the engine and let it run until the fue! lines and
carburetor are empty.
• Never useengine or carburetor cleaner products in the
fuel tank or permanent damage may occur.
° Use fresh fuel next season.
NOTE" Fuel stabilizer is an acceptable alternative in
minimizing the formation of fuel gum deposits during stor-
age. Add stabilizer to gasoline in fuel tank or storage
container. Always follow the mix ratio found on stabilizer
container. Run engine at least 10 minutes after adding "
stabilizer toallow the stabilizer to reach the carburetor. Do
not drain the gas tank and carburetor ifusing fuel stabilizer.
ENGINE OIL
Drain oil (with engine warm) and replace with clean engine
oil. (See "ENGINE" in the Customers Responsibilities
section of this manual).
CYLINDER
•Remove spark plug.
• Pour one ounce (29 ml) of oil through spark plug hole
into cylinder.
Pull starter handle slowly a few times to distribute oil.
Replace with new spark plug.
OTHER
• Do not store gasoline from one season to another.
• Replace your gasoline can if your can starts to rust.
Rust andio r dirt in your gasoline will cause problems.
• If possible, store your unit indoors and cover itto 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.
IMPORTANT: NEVER COVER MOWER WHILE ENGINE
AND EXHAUST AREAS ARE STILL WARM.
CAUTION: Never store the lawn mower
with gasoline in the tank inside a build-
ing where fumes may reach an open
flame or spark. :Allow the engine to
cool before storing in any enclosure.
ill i i
]
SQUEEZE TO FOLD
LOWER HANDLE
MOUNTING
PIN
HAIRPIN
COTI'ER
OPERATOR PRESENCE
CONTROL BAR
UPPER HANDLE_
FOLD FORWARD _._,
FORSTORAGE '_.
LOWER HANDLE
D BACKWARD
MOWING
POSITION
l
FIG. 15 :15

REPAIR PARTS CRAFTSMAN 22" ROTARY LAWN MOWER -MODEL NO. 917.378590
16
I
18
31
62
39
4O
1
36
43
38
42
45
,43
38
49
45
52
56
51

REPAIR PARTS CRAFTSMAN 22" ROTARY LAWN MOWER -MODEL NO. 917.378590
,.J.
"4
KEY PART
NO. NO.
1 133088X479
2 STD541425
3 130861
4 128415
5 103672X
7 131959
8 85827
9 51793
10 136376
11 88348
12 84676X479
13 74350424
16 54583
17 750157
18 701971X479
19 701969X479
22 128797
23 750097
24 87584X004
25 750149
26 12000014
27 87590
28 87593
29 87589
30 751592
31 750388X459
32 750386X459
33 74760612
35 750085X007
36 84920
38 850855X004
39 87877
40 750913X004
41 61651
DESCRIPTION KEY PART DESCRIPTION
NO. NO.
Upper Handle
Locknut
Zone Control Cable
Pop Rivet
Rope Guide
Handle Bolt
Cable Clip
Hairpin Cotter
Handle Knob
Flat Washer 3/8
Lower Handle
Hex Head Screw 1/4-20 x 1-1/2
Hex Tapping Screw 1/4-20 x 1/2
Support Rod
Handle Bracket Assembly (Left)
Handle Bracket Assembly (Right)
Rear Deflector
Hex Washer Head Screw #10-24 x 1/2
Deflector Bracket
Discharge Guard
E-Ring
Hinge Rod
Housing Bracket
Torsion Spring
Locknut
Support Bracket (Left)
SupportBracket (Right)
Hex Head Bolt 3/8-16 x 3/4
Wheel Adjusting Bracket
Spacer
Selector Spring
Selector Knob
Axle Arm Assembly
Rear Spring Washer H/W
42 84921
43 88017
44 57143
45 83923
46 85463
47 59289
48 55187
49 STD541425
50 851201X004
51 134612
52 850998
53 851084
54 850263
55 851074
56 850973
57 851514
59 700869X479
62 48324
63 84596
64 87677
68 141131
134027X479
141192
141193
Shoulder Bolt
Wheel & Tire Assembly
Wave Washer
Locknut 3/18-16
Danger Decal
Flat Washer
Thread Cutting Screw 5/16-18 x 3/4
Locknut
Washer
Debris Shield
Hex Head Thread Rolling Screw 3/8-16 x 1-1/8
Hex Head Screw 3/8-24 x 1-3/8 (Grd. 8)
Helical Lock Washer
Hardened Washer
Blade 22"
Blade Adapter
Front Baffle
Lawn Mower Housing (Incl. Ref. #46,59)
Engine Pulley
Hi-Pro Key #HP 505
Engine - Briggs & Stratton - Model No. 128802,
Type No. 0519-21
Rear Baffle (Not Shown)
Owner's Manual (English)
Owner's Manual (Spanish)
Available accessories not includedwith lawn mower:
7133072 Grass Catcher
71 33201 Mutcher Kit
7_!33623 Gas Can (2.5 gal.)
71 33500 Fuel Stabilizer
71 33300 SAE 30W Oil (20 oz.)
71 33316 Mower Cover

REPAIR PARTS
CRAFTSMAN 22" ROTARY LAWN MOWER -MODEL NO. 917.378590
o_
26
,%
i
21 1
13
24 29
30

REPAIR PARTS
CRAFTSMAN 22" ROTARY LAWN MOWER -MODEL NO, 917,378590
_D
KEY PART DESCRIPTION KEY PART
NO. NO. NO. NO.
1 851509 Control Bar 26 52160
2 STD541425 Locknut 1/4-20 27 85179
3 48029 Control Head Kit 28 77400
4 750029 Screw #10-24 x 2 29 702182
5 137076 Control Cable Assembly 30 87866
6 137078 V-Belt 32 137088
7 750097 Hex Washer Head Screw #10-24 x 1/2 34 77881
8 87930 Clip Guide (Housing) 35 48323
9 700875 Carriage Bolt 1/4-20 x 2 36 132010
10 4802 Washer 37 137052
12 69180 Locknut #10-24 39 75192
I3 88118 Fett Washer 40 850848
14 67725 Washer 1/2 x 1-1/2x.134 41 137090
15 87877 Selector Knob 42 702511
21 88080 Dust Cover 43 751809
22 137054 Pinion 44 751810
23 12000058 E-Ring 45 86012
24 700953 Wheel & Tire Assembly 46 851552
25 86960 Wheel Bushing
DESCRIPTION
Flat Washer
Retainer Clip
Hubcap
Drive Cover Decal
Pan Head Tapping Screw #10-24 x 2-3/4
Drive Cover
Spacer
Drive Control Cable Kit
Flanged Locknut 3/8-16
Drive Pulley
Spring
Hi-Pro Key
Spring
Gear Case Assembly (Complete)
Wheel Adjuster Assembly (Left)
Wheel Adjuster Assembly (Right)
Drive Shaft Cover
Pan Head Hi Lo Screw #10-16 x .63

REPAIR PARTS
22" CRAFTSMAN ROTARY LAWN MOWER - - MODEL NO. 917,378590
GEAR CASE ASSEMBLY PART NUMBER 702511
14
7
17
15
I
KEY PART
NO. NO. DESCRIPTION
1 17490416 Tapping Screw 1/4-20x 1-1/4
2 137055X004 Engagement Bracket
3 137053 Shifter
4 57072 Seal
5 702710 Grooved Pin 1/8 x 5/8
6 48373 Gear Case Halves Kit (Includes Key
Noso4, 5, and 7)
7 77881 Bearing
8 137051 Worm Shaft
9 137074 Drive Shaft
10 57079 Hardened Washer
11 131484 Clutch Yoke
12 700343 Bushing
KEY PART
NO. NO. DESCRIPTION
13 86447 Plug
14 137050 Helical Gear
15 750436X Clutch Jaw
16 750369 Grease
17 12000003 E-Ring
18 850848 Hi-Pro Key
19 81585X004 Spring Bracket
NOTE:
NOTE:
To reseal housing halves use Locktite No. 515,
Part No. 77923
All component dimensions given in U.S. inches.
1 inch = 25.4 mm
2O