Owner's Manual
22 INCH CUT
WHEELED
WEEDTRIMMER
Model No.
917.773421
• Safety
• Assembly
• Operation
• Maintenance
• Espa_ol
• .Repair Parts
_CAUTION:
Read and follow all
Safety Rules and Instructions
before operating this equipment.
Sears, Roebuck and Co., Hoffman Estates, IL 60179
Visit our Craftsman website: www.sears.com/craftsman
Warranty 2 Product Specifications 9
Safety Rules 2 Service and Adjustments 12
Assembly 5 Storage 14
Operation 6 Troubleshooting 15
Maintenance Schedule 9 Repair Parts 30
Maintenance 9 Parts Ordering Back Cover
LIMITED TWO YEAR WARRANTY ON CRAFTSMAN WEEDTRIMMER
For two years from date of purchase, when this Craftsman Weedtrimmer 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 workman-
ship.
If this Craftsman Weedtrimmer 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 rotating lines,
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 Weedtrimmer to the nearest
Sears Service Center in the United States. This warranty applies only while 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., Dept. 817 WA, Hoffman Estates, IL 60179
WARNING: This trimmer 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
authorized service center/department (See REPAIR PARTS section of this manual).
2
The operation of any trimmer can result in foreign objects thrown into
the eyes, which can result in severe eye damage. Always wear safety
glasses or eye shields while operating your trimmer or performing any
adjustments or repairs. We recommend a wide vision safety mask
over spectacles or standard safety glasses. The safety goggles
provided with your trimmer may be worn over spectacles.
I. GENERAL OPERATION
• Read, understand, and follow all
instructions on the machine and in the
manual before starting. Be thoroughly
familiar with the controls and the proper
use of the machine before starting.
• Do not put hands or feet near or under
rotating parts.
• Keep all parts of your body away from
muffler and spinning line. A hot muffler
can cause serious burns.
• Only allow responsible individuals, who
are familiar with the instructions, to
operate the machine.
• Stay away from breakable objects, such
as house windows, auto glass, green-
houses, etc.
• Clear the area of objects such as rocks,
toys, wire, bones, sticks, etc., which
could be picked up and thrown by the
spinning lines.
• Be sure the area is clear of other
people before trimming, particularly
small children and pets. Stop machine
if anyone enters the area.
• Wear appropriate clothing such as a
{ong-sleeved shirt or jacket. Also wear
long trousers or slacks. Do not wear
shorts.
• Do not wear loose clothing which could
get caught in this equipment.
• Do not operate the machine when
barefoot or wearing open sandals.
Always wear work gloves and sturdy
footwear. Leather work shoes or short
boots work well for most people. These
will protect the operator's ankles and
shins from small sticks, splinters, and
other debris, and improve traction.
• Do not pull machine backwards unless
absolutely necessary. Always look
down and behind before and while
moving backwards.
Do not operate the machine without
proper guards, plates or other safety
protective devices in place.
See manufacturer's instructions for
proper operation and installation of
accessories. Only use accessories
approved by the manufacturer.
Never use blades, wire, or flailing
devices. This unit is designed for line
trimmer use only. Use of other accesso-
ries or attachments will increase the risk
of injury.
Stop the rotating trimmer head when
crossing gravel drives, walks, or roads.
Wait for the cutting lines to stop rotating.
Stop the engine (motor) whenever you
leave the equipment and allow it to
cool, before cleaning, repairing or
inspecting the unit. Be sure the trimmer
head and all moving parts have
stopped.
Operate only in daylight or good
artificial light.
Do not operate the machine while
under the influence of alcohol or drugs.
Never operate machine in wet grass.
Always be sure of your footing: keep a
firm hold on the handle and walk; never
run.
• If the equipment should start to vibrate
abnormally, stop the engine (motor)
and check immediately for the cause.
Vibration is generally a warning of
trouble.
• Always wear safety goggles or safety
glasses with side shields when operat-
ing machine.
3
II. SLOPE OPERATION
Slopes are a major factor related to slip
and fall accidents which can result in
severe injury. All slopes require extra
caution. If you feel uneasy on a slope, do
not trim it.
DO:
• Trim across the face of slopes: never up
and down. Exercise extreme caution
when changing direction on slopes.
• Remove obstacles such as rocks, tree
limbs, etc.
• Watch for holes, ruts, or bumps. Tall
grass can hide obstacles.
DONO_
• Do not trim near drop-offs, ditches or
embankments. The operator could lose
footing or balance.
• Do not trim excessively steep slopes.
• Do not trim on wet grass. Reduced
footing could cause slipping.
II1. CHILDREN
Tragic accidents can occur if the operator
is not alert to the presence of children.
Children are often attracted to the machine
and the trimming activity. Never assume
that children will remain where you last
saw them.
• Keep children out of the trimming area
and under the watchful care of another
responsible adult.
• Be alert and turn machine off if children
enter the area.
• Before and while moving backwards,
look behind and down for small
children.
• Never allow children to operate the
machine.
• Use extra care when approaching blind
corners, shrubs, trees, or other objects
that may obscure vision.
I_ SERVICE
• Use extra care in handling gasoline
and other fuels. They are flammable
and vapors are explosive.
Use only an approved container.
Never remove gas cap or add fuel
with the engine running. Allow
engine to cool before refueling. Do
not smoke.
Never refuel the machine indoors.
Never store the machine or fuel
container inside where there is an
open flame, such as a water heater.
Move away from fueling site before
starting engine.
• Never run a machine inside a closed
area.
• Never make adjustments or repairs
with the engine (motor) running.
Disconnect the spark plug wire, and
keep the wire away from the plug to
prevent accidental starting.
• Keep nuts and bolts, especially trimmer
head and engine bolts, tight and keep
equipment in good condition.
• Never tamper with safety devices.
Check their proper operation regularly.
• Keep machine free of grass, leaves, or
other debris buildup. Clean oil or fuel
spillage. Allow machine to cool before
cleaning or storing storing.
• Stop and inspect the equipment if you
strike an object. Repair, if necessary,
before restarting.
• Do not change the engine governor
setting or overspeed the engine.
• Clean and replace safety and instruc-
tion decals as necessary.
_Loo,k for this symbol to point out impor-
tant sarety precautions. It means CAU-
TION!H BECOMEAWARE!H YOUR
SAFETY IS INVOLVED.
_CAUTION: In order to prevent acci-
dental starting when setting up, transport-
ing, adjusting or making repairs, always
disconnect spark plug wire and place
wire where it cannot contact spark plug.
,_ILWARNING: The engine exhaust from
this product contains chemicals known to
the State of California to cause cancer,
birth defects, or other reproductive harm.
4
Readtheseinstructionsandthismanualin its
entiretybeforeyouattempttoassembleor
operateyournewtrimmer.
IMPORTANT"Thistrimmerisshipped
WITHOUTOILORGASOLINEintheengine.
Yournewtrimmerhasbeenassembledatthe
factorywiththeexceptionofthosepartsleft
unassembledforshippingpurposes.Allparts
suchasnuts,washers,bolts,etc.,necessary
tocompletetheassemblyhavebeenplaced
inthepartsbag. Toensuresafeandproper
operationofyourtrimmer,all parts and
hardware you assemble must be tightened
securely. Use the correct tools as necessary
to ensure proper tightness.
Loose Parts Packed Separately
Safety 20 oz. Trimmer Lines
Goggles Bottle of oil (2) Sets
(0.155 diameter
x 18.75 inches long)
TO REMOVE TRIMMER FROM CARTON
• Remove loose parts included with trimmer.
• Cut down two end comers of carton and
lay end panel down flat.
• Remove all packing materials.
• Roll trimmer out of carton and check carton
thoroughly for additional loose parts,
HOW TO SET UP YOUR TRIMMER
TO UNFOLDHANDLE
IMPORTANT: Unfold handle carefully so as
not to pinch or damage control cables.
1. Loosen handle knob enough to allow
upper handle to be unfolded from the
shipping position.
2. Raise upper handle section into place
on lower handle and tighten handle
knob.
3. Remove handle padding holding
trimmer head control bar to upper
handle.
Your trimmer handle can be adjusted for
your trimming comfort. Refer to "Adjust
Handle" in the Service and Adjustment
section of this manual.
Upper::
handle
, • f
.... - : Lift up
,_. • J
Handle knob _;i
Lower handle J ....
5
KNOW YOUR TRIMMER
READ THIS OWNER'S MANUALAND SAFETY RULES BEFORE OPERATING YOUR
TRIMMER. Compare the illustrations with your trimmer to familiarize yourself with the location
of various controls and adiustments. Save this manual for future reference.
These symbolsmay appear on your trimmer or in literaturesuppliedwith the product.Leam and understand
their meaning.
AVeao_mm mJmVonoum _h) @
CAUTION ENGINE OFF
FAST SLOW
FUEL OIL
Trimmer head control bar
Throttle control Trimmer head control lever
Starter handle
Handle knob
cap
Engine
cover
Primer
Engine oil
cap w/
dipstick
Chassis
head
IMPORTANT: This trimmer is shipped
WITHOUT OIL OR GASOLINE inthe engine.
--Trimmer line
Trimmer head control bar - must be held
down to the handle to engage trimmer head.
Release to stop the trimmer head.
Primer - pumps additionalfuel from the
carburetor to the cylinder for use when
starting a cold engine.
Throttle control - used for starting and
stoppingthe engine and allows you to select
either fast or slow engine speed.
Starter handle - used for startingthe engine.
Trimmer head control lever - used to
engage trimmer head.
6
SAFETYGLASSES
The operation of any trimmer can result in
foreign objects thrown into the eyes,
which can result in severe eye damage•
Always wear safety glasses or eye shields
while operating your trimmer or perform-
ing any adjustments or repairs. We
recommend a wide vision safety mask
over spectacles or standard safety
glasses. The safety goggles provided with
your trimmer may be worn over spec-
tacles.
HOWTO USE YOUR TRIMMER
ENGINESPEED
The engine speed is controlled by a
throttle located on the side of the upper
handle. Fast position is for starting and
normal trimming. Slow is for light trimming
and fuel economy• Stop is for stopping the
engine,
Trimmer head
control bar
To engage
trimmer head
Drive
control
lever
#
Trimmer head
disengaged
TO ADJUST TRIMMING HEIGHT
_CAUTION: Stop the engine and wait
for all moving parts to stop. Disconnect
spark plug wire from spark plug and
place wire where it cannot come in
contact with plug.
The height of cut can be set to six (6)
different positions ranging from 1-1/2
inches to 3 inches. Recommended cutting
height for the average yard is 2 inches.
1. To adjust trimming height, push in the
locking plate tab and move trimmer
head up or down to desired position.
2. Release tab and be sure head is
locked into one of the six (6) height
positions.
TRIMMER HEAD DRIVE CONTROL
Adjustable
Head
Your trimmer is equipped with a trimmer
head drive control bar and lever which Locking
Plate Tab
requires the operator to be positioned
behind the trimmer handle to operate the
trimmer.
• Trimmer head rotation is controlled by
holding the trimmer head control bar
down to the handle and pushing the
drive control lever forward until it clicks; j
then release the lever.
f
• Trimmer head rotation will stop when
the control bar is released.
1
\
7
BEFORE STARTING ENGINE
ADD OIL
Your trimmer is shipped without oil in the
engine. Engine holds 20 oz. of oil. For
type and grade of oil to use, see "ENGINE"
in Maintenance section of this manual.
1. Be sure trimmer is level and area
around oil fill is clean.
2. Remove engine oil cap and fill to the
full line on the dipstick. Pour oil slowly.
Do not over fill.
NOTE: Allow oil to settle down into engine
for accurate dipstick reading. To read
proper level, tighten engine oil cap, then
remove it to read the dipstick.
3. Reinstall engine oil cap and tighten.
• Check oillevel before each use. Add oil if
needed. Fillto full lineon dipstick.
• Change the oil after every 25 hours of
operation or each season. You may need
to change the oil more often under dusty,
dirty conditions.
ADD GASOLINE
• Fill fuel tank. Use fresh, clean, regular
unleaded gasoline with a minimum of 87
octane. Do not mix oil with gasoline.
Purchase fuel in quantities that can be used
within 30 days to assure fuel freshness.
_iLWARNING: 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 of 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.
CAUTION: Fill to bottom of gas tank
filler neck. Do not overfill. Wipe off any
spilled oil or fuel. Do not store, spill or use
gasoline near an open flame.
Gasoline
_ filler cap
Engine oil cap --_
8
TO START ENGINE
1. To start a cold engine, push primer three
(3) times before tryingto start. Use a firm
push. This step is not usually necessary
when starting an engine which has
already run for a few minutes.
2. Move throttle control lever to fast position.
3. Hold upper handle firmly and pull starter
handle quickly. Do not allow starter rope
to snap back.
TO STOP ENGINE
• To stop engine, move throttle control lever
to stop position.
NOTE: In cooler weather it may be
necessary to repeat priming steps. In
warmer weather overpriming 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. /.._.
Throttle __
control -_-_ _.!_
TRIMMING TIPS
• Set the throttle control in the fast
position. If the weeds or grass are tall
and thick, operate the trimmer at a
slower walking speed.
• Frequently clean the underside of the
trimmer to remove any grass build up.
Keep top of engine around starter clear
and clean of grass clippings and chaff.
This will help engine air flow and extend
engine life. See TO REMOVE ENGINE
COVER in the Maintenance section of
this manual.
• For best results and longer lasting line,
use the ends of the line to do the cutting.
This is easily done by moving slowly
through very thick and heavy weeds.
• Use the left side of trimmer when
trimming along fences, walls, flowerbeds
and other such objects.
• If trimmer lines become too short, it will
take longer to complete the job. If
trimmer lines are worn to less than half
their original length, they should be
replaced. See TO REPLACE TRIMMER
LINE in the Maintenance section of this
manual.
• Trimmer head contact with concrete,
asphalt or other hard surfaces may
cause premature wear of the ball on
bottom of trimmer head.
MAINTENANCE SCHEDULE
FILL IN DATES
AS YOU COMPLETE
REGULAR SERVICE
,,,"4
Check for Loose Fasteners If If
T Clean Trimmer I_ t,/
/
!r_l Clean Under Engine Cover 6/' 2 IV/
;M
i E Check drive belt/pulleys I_
R
Check/Replace Trimmer Lines 1_3
Y2"SERV'OEOATES
Check Engine Oil Level i/
E Change Engine Oil I/'1,2
N clean Air Filter V e 2
I Inspect Muffler I/'
NE Clean or Replace Spark Plug I_
Replace Air Filter Paper Cartridge I_ 2
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 trimmer lines when Ihey have worn to hag their original length.
GENERALRECOMMENDATIONS
The warranty on this trimmer does not
cover items that have been subjected to
operator abuse or negligence. To receive
full value from the warranty, operator must
maintain trimmer 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
and replace air filter element. A new
spark 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
1. Check engine oil level.
2. Check for loose fasteners.
3. Clean under engine cover.
LUBRICATION
To prolong the useful life of your trimmer,
change engine oil as recommended in
this section of Owner's Manual.
IMPORTANT: Do not oil or grease plastic
wheel bearings. Viscous lubricants will attract
dust and dirt that will shorten the life of the
self- lubricating bearings. If you feel they must
be lubricated, use only a dry, powdered
graphite type lubricant sparingly.
PRODUCT SPECIFICATIONS
Serial No.
Date of Purchase:
Gasoline Type:
Gasoline Capacity:
Oil Type:
(API-SF/SG/SH)
Oil Capacity:
Spark Plug :
(Gap: .030")
Valve Clearance:
Trimmer Line Dia.:
Trimmer Line Length:
Unleaded Regular
1.25 Quarts
SAE 30 (Above 32 ° F)
SAE 5W-30 (Below 32 ° F)
20 Ozs.
Champion J19LM
or RJ19LM
Intake: .004-.008
Exhaust: .004-.008
.155 inch
18.75 inches
The model and serial numbers will be found on
a decal attached to the rear of the trimmer.
Record both serial number and date of
purchase in space provided above.
9
TRIMMER
Always observe safety rules when perform-
ing any maintenance.
TIRES
• Keep tires free of gasoline, oil, or insect
control chemicals which can harm rubber.
• Avoid stumps, stones, deep ruts, sharp
objects and other hazards that may cause
tire damage.
TRIMMER LINE
For best results, replace trimmer lines
when they have worn to half their original
length. Use .155 inch diameter trimmer
line. Cut new trimmer line length to 18-3/4
inches. After new line is installed on
trimmer head, check all lines so they do
not vary more then one (1) inch in length.
This is important to make sure the trimmer
head is balanced and will not vibrate
abnormally.
_&WARNING: Use only the specified
trimmer line. Do not use other materials
such as wire, string, rope, etc. Wire can
break off during trimming and become a
dangerous missile that can cause serious
injury.
TO REPLACE TRIMMER LINE
1. Disconnect spark plug wire from spark
plug and place wire where it cannot
come in contact with spark plug.
2. Remove worn trimmer line from line
carrier plate.
3. Fold new, cut to length, trimmer line in
half and insert folded end through
carrier plate opening to back side of
retainer clip.
4. With folded end of line at back side of
retainer clip, pull line outward until
line is fully seated under the retainer
clip.
5. Repeat on other side of carrier plate.
6. Check all lines to be sure they are the
same length.
7. Reconnect spark plug wire to spark
plug.
Carrier plate
opening
clip
ENGINE
LUBRICATION
Use only high quality detergent oil rated
with API service classification SF, SG or
SH. Select the oil's SAE viscosity grade
according to your expected operating
temperature.
SAE VISCOSITY GRADES
.20; 0 . 30 32 = 40" 60. 80' 100
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE
NOTE: Although multi-viscosity oils
(5W30, 10W30 etc.) improve starting in
cold weather, these multi-viscosity oils
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.
Change the oil after every 25 hours of
operation or at least 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 and after each five (5)
hours of continuous use. Tighten oil plug
securely each time you check the oil
level.
10
TO CHANGE ENGINEOIL
NOTE: Before tipping trimmer to drain
oil, drain fuel tank by running engine
until fuel tank isempty.
1. Disconnect spark plug wire from spark
plug and place wire where it cannot
come in contactwith spark plug.
2. Removeengine oil cap; lay aside on a
clean surface.
3. Tip trimmeron its side as shownand
drain oil into a suitable container.
Rocktrimmer back and forthto
removeany oil trapped inside of
engine.
4. Wipe off.any spilled oil on trimmer and
on side of engine.
5. Fill engine with oil (See "ADD OIL" in
the Operationsection of this manual).
6. Replace engine oil cap.
7. Reconnect spark plug wire to spark
plug.
Container
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
1. Remove the air filter by turning
clockwise to the stop and pull away
from collar.
2. Remove filter from inside of cover.
3. Clean the inside of the cover and the
collar to remove any dirt accumula-
tion.
4. Insert new filter into cover.
5. Put air filter cover and filter into collar
aligning the tab with the slot.
6. Push in on cover and turn counter-
clockwise to tighten.
Collar
Turn
clockwise
to remove
Air fitter
cover
Turn
counterclockwise 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.
CLEANING
IMPORTANT" For best performance,
keep trimmer free of built-up grass and
trash. Clean the underside of your
trimmer after each use.
_I,CAUTION: Disconnect spark plug wire
from spark plug and place wire where it
cannot come in contact with the spark
plug.
• Turn trimmer on its side. Make sure air
filter and carburetor are up. Clean the
underside of your trimmer 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 trimmer unless the
electrical system, muffler, air filter and
carburetor are covered to keep water
out. Water in engine can result in
shortened engine life.
11
CLEAN UNDER ENGINE COVER
Clean under engine cover before each
use, or more frequently in heavy cutting
or dirty conditions. Engine cover screen
and engine air intake screen must be
kept free of dirt and chaff to prevent
engine damage from overheating.
Knob Engine
_ i civer
._
/ ' ,ii:i i
Starter ' , :-_ ....
rope _=;.:_ !
Be sure engine is cool before cleaning.
1. Unscrew knob on top of cover.
2. Lift cover up and away from engine.
3. Clean cover and cover screen
thoroughly.
4. Clean top of engine and air intake
screen.
5. Replace engine cover and tighten
knob securely. Be sure the front tabs
of engine cover are located in the
slots in engine housing.
Threaded
Engine
cover
screen
Air intake screen
Housing
slots
_, CAUTION: Before performing any
service and adjustments:
1. Stop engine.
2. Make sure the rotating lines and all
moving parts have completely
stopped.
3. Disconnect spark plug wire from spark
plug and place where it cannot come
in contact with plug.
TRIMMER
TO ADJUST TRIMMING HEIGHT
See "TOAD JUST TRIMMING HEIGHT" in the
Operation section of this manual.
TO ADJUST HANDLE
The upper handle may be adjusted to
different height positions.
• Loosen handle knob only enough to
allow the upper handle to pivot to the
desired position.
• Tighten handle knob securely.
NOTE: The handle knob and bolt may be
reversed for left handed operation.
Upper
Handle
knob
12
. TO REMOVE/REPLACE TRIMMER HEAD
DRIVE BELT
1. Remove screw at front of chassis
cover.
2. Lift cover up and away from trimmer.
3. Turn trimmer on its side with carbure-
tor and fuel cap up.
4. Remove belt from engine pulley on
crankshaft.
5. Remove belt from trimmer head pulley.
6. Remove idler assembly from chassis
and remove belt and idler from
trimmer.
7. Remove belt from idler assembly by
removing bottom belt keeper and idler
pulleys.
8. Assemble new belt, idler pulleys and
bottom belt keeper to idler bracket.
Tighten pulley bolts securely.
NOTE: Be sure belt is inside top belt
keeper on idler assembly.
9. Position belt and idler assembly in
trimmer and assemble idler to chassis.
Tighten securely.
10. Install belt around trimmer head pulley
and engine pulley.
11. Replace chassis cover and tighten
screw securely.
Always use Craftsman replacement parts
to assure proper fit and long life.
/ Screw
Chassis
COVer
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 the engine is running too fast
or too slow, take your unit to a Sears oc
other qualified service center for repair
and/or adjustment.
CARBURETOR
Your carburetor has a nonadjustable fixed
main jet for mixture control. If your engine
does not operate properly due to sus-
pected carburetor problems, take your
unit to a Sears or other qualified service
center for repair and/or adjustment.
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. If you think the
engine-governed high speed needs
adjusting, take your unit to a Sears or
other qualified service center, which has
proper equipment and experience to
make any necessary adjustments.
Belt
Top belt ""-.
keeper Bolt
Engine
pulley Spacer
Nut
V-idler
Idler
13
Idler
bracket
Flat idler
"-Bottom belt
keeper
Flat idler
Trimmer
head pulley
Immediately prepare your trimmer for storage
at the end of the season or if the unit will not
be used for 30 days or more.
TRIMMER
When trimmer is to be stored for a period of
time, clean itthoroughly, remove all dirt,
grease, leaves, etc. Store in a clean, dry area.
1. Clean entire trimmer (See "CLEANING" in
the Maintenance section of this manual).
2. Lubricate as shown in the Maintenance
section of this manual.
3. Be sure that all nuts, bolts, screws, and
pins are securely fastened. Inspect
moving parts for damage, breakage and
wear. Replace if necessary.
4. Touch up all rusted or chipped paint
surfaces; sand lightly before painting.
HANDLE
You can fold your trimmer handle for storage.
• Loosen handle knob enough to allow
upper handle to be folded forward.
IMPORTANT: When folding the handle for
storage or transportation, be sure to fold the
handle as shown or you may damage the
control cables.
:;r_t
Upper / _
handle J
,\
Handle knob
ENGINE
FUEL SYSTEM
IMPORTANT: Itisimportant to prevent gum
depositsfrom 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 duringstorage. Acidic gas
can damage the fuel system of an engine
while in storage.
1. Drain the fuel tank.
2. Start the engine and let it run until the
fuel lines and carburetor are empty.
• Never use engine or carburetor cleaner
products in the fuel tank or permanent
damage may occur.
• Use fresh fuel next season.
14
NOTE: Fuel stabilizer is an acceptable
alternative in minimizing the formation of fuel
gum deposits during storage. 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 to allow the stabilizer to
reach the carburetor. Do not drain the gas
tank and carburetor if using fuel stabilizer.
ENGINE OIL
Drain oil (with engine warm) and replace with
clean engine oil. (See "ENGINE" in the
Maintenance section of this manual).
CYLINDER
1. Remove spark plug.
2. Pour one ounce (29 ml) of oil through
spark plug hole into cylinder.
3. Pull starter handle slowly a few times
to distribute oil.
4. 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 and/or 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 trimmer while
engine and exhaust areas are still warm.
_I_CAUTION: Never store the trimmer
with gasoline in the tank inside a building
where fumes may reach an open flame or
spark. Allow the engine to cool before
storing in any enclosure.
TROUBLESHOOTING
CAUSE CORRECTIONPROBLEM
Does not start
Loss of power
Excessive
Vibration
Starter rope hare
to pull
Loss of head
drive
Hard to push
Poor trimming
performance
Trimmer head
does not
retain line
1. Dirty air filter.
2. Out of fuel.
3. Stale fuel.
4. Water in fuel.
5. Spark plug wire is
disconnected.
6. Bad spark plug.
7. Throttle control lever not
in correct position
(if equipped).
1. Dirty air filter.
2. Buildup of grass, leaves,
and trash under trimmer.
3. Too much oil in engine,
4. Walking speed too fast.
1, Lines uneven or broken.
2. Loose nuts or bolts.
3. Damaged trimmer head.
1. Bent engine crankshaft.
1. Belt not driving.
1. Handle height position not
right for you.
1. Trimmer line length is
too short.
2. Throttle control lever not
in correct position
(if equipped).
1. Trimmer line not
properly installed.
2. Broken line retainer clip.
3. Incorrect size of
trimmer line.
1. Clean/replace air filter.
2. Fill fuel tank.
3. Drain tank and refill with
fresh clean fuel.
4. Drain fuel tank and
carburetor and refill tank
with fresh gasoline,
5. Connect wire to plug.
6. Replace spark plug.
7. Move throttle lever to FAST
position.
1. Clean/replace air filter.
2. Clean underside of trimmer
and trimmer head.
3. Check oil level.
4. Trim at slower walking
speed.
1. Check trimmer lines.
2. Check all hardware,
including engine bolts.
3. Check/repair trimmer head.
1. Contact a Sears or other
qualified service center.
1. Put belt on pulleys or
replace belt if broken.
1. Adjust handle height
to suit.
1. If line is worn or broken to
half original length,
replace line.
2. Move throttle lever to FAST
position.
1. Follow instructions in
Maintenance section.
2. Replace string carrier plate
assembly.
3. Use .155 diameter
trimmer line.
15
CRAFTSMAN WEED TRIMMER- - MODEL NO. 917.773421
21
27
19
28 18
11
15
14 8
26 23
/
22
2
24
25
4
6
29
3O
9
25
5
26
27
3O
CRAFTSMAN WEED TRIMMER-- MODEL NO. 917.773421
KEY PART
NO. NO. DESCRIPTION
1 Engine Model No. 143.005512
(See Breakdown)
2 150406 Engine Bolt 3/8-16
3 169791 Engine Pulley (Includes setscrew)
4 STD502502 Setscrew, Pulley
5 174317 Engine Cover w/screen
6 174274 Engine Cover Knob
7 174030 Engine Cover Stud
8 169821X479 Lower Handle
9 150078 Screw Hx Wshd 5/16-18 x .75
10 169797X479 Upper Handle
11 170980 Handle Bolt
12 136376 Handle Knob
13 170681 Handle Adjuster (Inside)
14 170682 Handle Adjuster (Outside)
15 170554 Handle Adjust Spring
16 153638 RopeGuide
17 STD541025 Locknut 1/4 x 20
18 66426 WireTire
19 171449 ControlBar
20 174038 Throttle Control
21 158755 HexWasher Screw
22 174750X004 Axle Shaft Assembly
23 150078 Screw hex Wshd 5/16-18 x .75
24 174751 Axle Spacer
25 57143 WaveWasher
26 151161 Wheel 14 x2
27 83923 Hex Flange Locknut 3/8-16
28 174037 Drive Control
29 174034 Decal- Warning
30 174039 Decal - Engine Cover
- - t 69803 Safety Goggles (Not Shown)
- - 175025 Owner's Manual
Available accessories not included with trimmer:
7133623 Gas Can (2.5 gal.)
7133000 SAE 30W Oil (20 oz.)
7179997 Trimmer Line (Pack of 24 strings,. 155 dia.)
31
CRAFTSMAN WEED TRIMMER-- MODEL NO. 917.773421
1
\
14
43
\
20
4
40 /
I1
9
_2
23
24
27
32
0_31
32
CRAFTSMAN WEED TRIMMER- - MODEL NO. 917.773421
KEY PART
NO. NO. DESCRIPTION
1 174031X558 Chassis Assembly
2 169802 Line .155Dia x 18.75
3 173715 Screw 5/16-18 x 1Self Tapping
4 169790 Belt V
5 172145X004 Idler Bracket
6 166042 Idler Pulley V-Groove
7 173716 Hex Bolt 3/8-16 x 1.25
8 751592 Hex Locknut 3/8-16
9 166043 Idler Pulley-Flat
10 160829 Shoulder Bolt
11 155552 Locknut 5/16-18
12 173717 Spacer
13 142748 Shoulder Bolt
14 145212 Flange Locknut
15 173811 Return Spring
16 170552 Debris Shield
17 57808 Screw 1/4-20 x 1/2
18 85768 Screw #10-24 x 3/4
19 169800 Skirt
20 170553 Chassis Cover - Top
21 149746 Screw #10-24 x 1-3/4
22 STD541137 Nut3/8-24UNF
23 STD551137 Lockwasher 3/8
24 STD551037 Flatwasher 3/8
25 169792 Pulley - Driven
26 172551 Spacer- Pulley
27 174549 Bearing
28 172520 Jackshaft
29 169766 Cover, Bottom
30 174543 Spindle Hsg. Asm. (" Includes Upper Bearing Key No. 27)
31 174581 Retaining Ring 17mm External
32 176973 Spring, Lock Plate
33 172519 Locking Plate
34 174544 Carrier Plate Assembly
36 172516 Cover, Bearing
37 174580 Retaining Ring 40ram Internat
38 172523 MowBall
39 172636 Bolt, Mow Ball
40 172342 Head Assembly Complete (Includes Key Nos. 22-39)
41 174029 Spacer
43 174042 Decal - Instruction
44 174035 Decal - Chassis Cover
45 174596 Bottom Belt Keeper
33
CRAFTSMAN 4-CYCLE ENGINE MODEL NO. 143.005512
900
400
130
135
126 101
261
260 )
262_'_
_'_ 287
_.b 370A
/285
301
298 . 3_3
_" 292
290
7 _k. 292
416
120
119
125
46
34
CRAFTSMAN 4-CYCLE ENGINE MODEL NO. 143.005512
KEY PART
NO. NO. DESCRIPTION
1 37266
2 26727
6 33734
7 36557
12 36775
12A 36558
12B 36694
14 28277
15 30589
16 34839A
17 31335
18 651018
19 37329
20 32600
30 37459
40 40027
40 40028
41 40025
41 40026
42 40006
42 40007
43 20381
45 36777
46 32610A
48 27241
50 37460
52 29914
69 37130
70 34311E
72 36083
75 27897
80 30574A
81 30590A
82 30591
83 30588A
86 650488
89 610961
90 611213
92 650815
93 650816
100 34443B
101 610118
103 651007
104 37480
110 36230
119 36787
120 36825
125 37288
126 37289
130 6021A
135 35395
150 31672
151 31673
151A 40O17
169 36783
KEY PART
NO. NO.
Cylinder (Incl. 2,20 & 150)
Dowel Pin 172 36784
Breather Element 174 30200
Breather Ass'y. (Incl. 6 & 12A) 178 29752
Breather Tube 179 30593
Breather Cover & Tube (Incl. 182 6201
12B) 184 26756
Breather Tube Elbow
Washer 185 36785
Governor Rod (Incl. 14) 186 36201
Governor Lever 200 37134
Governor Lever Clamp 206 610973
Screw, Torx 1"-15, 8-32 x 19/ 207 36200B
64" 209 30200
Extension Spring 223 650451
Oil Seal 224 36786
Crankshaft 238 650932
Piston, Pin & Ring Set (Std.) 239 34338
Piston, Pin & Ring Set (.010" 241 36919
OS) 245 36905
Piston & Pin Ass'y. (Std.) (Incl. 250 37122
43) 260 37213A
Piston & Pin Ass'y. (.010" OS) 261 30200
(Incl. 43) 262 650831
Ring Set (Std.) 275 36790A
Ring Set (.010" OS) 277 650988
Piston Pin Retaining Ring 285 35000A
Connecting Rod Ass'y. (Incl. 28"_ 650926
46) 290 34357
Connecting Rod Bolt 292 26460
Valve Lifter 298 28763
Camshaft (Exhaust MCR)(Inc. 300 35586
Ref 104) 301 36246
Oil PumpAss'y. 305 35577
Mounting Flange Gasket 306 36996
Mounting Flange (Incl. 72 thru 307 35499
83,306) 309 650562
Oil Drain Plug 310 35578
Oil Seal 313 34080
Governor Shaft 370C 37318
Washer 380 640262
Governor Gear Ass'y. (Incl. 81) 390 590739
Governor Spool 400 36792B
Screw, 1/4-20 x 1-1/4"
Flywheel Key 416 36085
Flywheel
Belleville Washer 417 650821
Flywheel Nut 900
Solid State Ignition
Spark Plug Cover
Screw, Torx T-15, 10-24 x 15/
16"
Cam Bushing
Ground Wire
Cylinder Head Gasket
Cylinder Head
Exhaust Valve (Std.)
(Incl. 151)
Intake Valve (Std.) (incl. 151)
Screw, 5/16-18 x 1-1/2"
Resistor Spark Plug (RJ19LM)
Valve Spring
Valve Spring Cap
Intake Valve Seal
Valve Cover Gasket
DESCRIPTION
Valve Cover
Screw, 10-24 x 9/16"
Nut & Lock Washer, 1/4-28
Retainer Clip
Screw, 1/4-28 x 7/8"
Carburetor To Intake Pipe
Gasket
Intake Pipe
Governor Link
Control Bracket (Incl. 206)
Terminal
Throttle Link
Screw, 10-24 x 9/16"
Screw, 1/4-20 x 1"
Intake Pipe Gasket
Screw, 10-32 x 49/64"
Air Cleaner Gasket
Air Cleaner Collar
Air Cleaner Filter
Air Cleaner Cover
Blower Housing
Screw, 10-24 x 9/16"
Screw, 1/4-20 x 1/2"
Muffler
Screw, 1/4-20 x 2-9/32"
Starter Cup
Screw, 8-32 x 21/64"
Fuel Line
Fuel Line Clamp
Screw, 10-32 x 35/64"
Fuel Tank (Incl. 292 & 301)
Fuel Cap
Oil Fill Tube
"O"-Ring
"O"-Ring
Screw, 10-32 x 3/8"
Dipstick
Spacer
Primer Decal (3X)
Carburetor (Incl. 184)
Rewind Starter
Gasket Set (Incl. Items
Marked *)
Spark Arrestor Kit (Incl.
417)(Optional)
Screw, 10-32 x 1/2" (Optional)
Replacement Short Block
750837B
RPM High 3450 to 3750
RPM Low 2000 to 2300
NOTE: This engine could have been built
with 590702 starter).
NOTE: All component dimensions given in U.S.
inches 1 inch = 25.4 mm
35
CRAFTSMAN 4-CYCLE ENGINE MODEL NO. 143.005512
36A
27
_--37
_36
_37
2s__
Y_
40
36
CRAFTSMAN 4-CYCLE ENGINE MODEL NO. 143.005512
KEY PART
NO. NO.
-- 640262
1 631615
2 631767
4 631184 *
5 631183 *
6 640070
7 650506 *
16 631807
17 651025
18 630766
20 640018
20A 640200
25 631867
27 631024 *
28 632019
29 631028 *
30 631021 *
31 631022
35 640259
36 640080
36A 632766
37 632547 *
40 640175
44 27110A *
47 630748
48 631027 *
60 632760B
DESCRIPTION
Carburetor (Incl. 184 of Engine Parts List)
Throttle Shaft & Lever Assembly
Throttle Return Spring
Dust Seal Washer
Dust Seal (Throttle)
Throttle Shutter
Shutter Screw
Fuel Fitting
Throttle Crack Screw/Idle Speed Screw
Tension Spring
Idle Restrictor Screw
Idle Restrictor Scrwe Cap (Black)
Float Bowl
Float Shaft
Float
Float Bowl "O" Ring
Inlet Needle, Seat, & Clip (Incl. 31)
Spring Clip
Primer Bulb/Retainer Ring
Main Nozzle Tube
Carburetor Tube
"O" Ring, Main Nozzle Tube
High Speed Bowl Nut
Bowl Nut Washer
Welch Plug, Idle Mixture Well
Welch Plug, Atmospheric Vent
Repair kit (Incl. Items Marked *)
37
CRAFTSMAN 4-CYCLE ENGINE MODEL NO. 143.005512
12
11
8
=;7
B -5
KEY PART
NO. NO.
m
1
2
3
4
5
6
7
8
11
12
13
590702
590599A
590600
590696
590601
590697
590698
590699
590700
590703
590535
590701
DESCRIPTION
Recoil Starter
Spring Pin (Incl. 4)
Washer
Retainer
Washer
Brake Spring
Starter Dog
Dog Spring
Pulley & Rewind Spring Ass'y.
Starter Housing Ass'y. (40 degree grommet)
Starter Rope ( 98" X 9/64" dia.)
Starter Handle
38
CRAFTSMAN 4-CYCLE ENGINE MODEL NO. 143.005512
V'--14
/
13
KEY
NO.
0
3
6
7
8
11
12
13
14
PART
NO.
590739
590740
590616
590617
590618A
590638
590535
590701
590760
DESCRIPTION
Rewind Starter
Retainer
Starter Dog
Dog Spring
Pulley & Rewind Spring Ass'y
Starter Housing Ass'y (40
degree grommet)
Starter Rope (Length 98" x 9/
64" dia.)
Starter Handle
Spring Clip
39
Get it fixed, at your home or ours!
For repair of major brand appliances in your own home...
no matter who made it, no matter who sold it!
1-800-4-MY-HOME sM Anytime, day or night
(1-800-469-4663)
www.sears,com
To bring in products such as vacuums,
lawn equipment and electronics for repair, call for
the location of your nearest Sears Parts & Repair Center.
1-800-488-1222 Anytime, day or night
www.sears.com
For the replacement parts, accessories and owner's manuals
that you need to do-it-yourself, call Sears PartsDirectSM!
1-800-366-PART 6 a.m.- 11 p.m. CST,
(1-800-366-7278) 7 days a week
www.sears.com/par tsdirect
To purchase or inquire about a Sears Service Agreement:
1-800-827-6655
7 a.m.- 5 p,m. CST, Mon.- Sat.
Para pedir servicio de reparacibn a domicilio,
y para ordenar piezas con entrega a domicilio:
1-888-SU-HOGAR s_
(1"888-784-6427)
Au Canada pour service en frangais:
1-877-LE-FOYER s.
(1-877-533-6937)
© Sears, Roebuck and Co.
TM
® Registered Trademark / Trademark of Sears, Roebuck and Co.
® Marca Registrada / _M Marca de Fabrica de Sears, Roebuck and Co.
175025 Rev.1 06.20.00 rad Printed in U.S.A.
