Craftsman 917.77342 User Manual

Owner's Manual

5.5 HORSEPOWER
22 INCH CUT

WHEELED
WEEDTRIMMER

Model No.

917.773420

• Safety

• Assembly

• Operation

• Maintenance

• EspaSol

• 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 ofany trimmer can resultin foreign objectsthrown into
the eyes, whichcan result in severeeye damage. Always wear safety

glasses or eye shields while operatingyour trimmer or performing any
adjustmentsor repairs. We recommenda widevision safety mask
over spectaclesor standardsafety glasses.The safety goggles

provided with yourtrimmer may beworn 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
long-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.

DO NOT:

• 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.

IV, 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.

_Look for this symbol to point ouutimpor-
tant safety precautions. It means t.,_u-
TION!!! BECOME AWARE!!! 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.

_kWARNING: The engine exhaust from

this product contains chemicals known to

the State of California to cause cancer,

birth defects, or other reproductive harm.

4

Read these instructions and this manual in its

entirety before you attempt to assemble or

operate your new trimmer.
IMPORTANT: This trimmer is shipped
WITHOUT OIL OR GASOLINE in the engine.

Your new trimmer has been assembled at the
factory with the exception of those parts left

unassembled for shipping purposes. All parts
such as nuts, washers, bolts, etc., necessary
to complete the assembly have been placed
in the parts bag. To ensure safe and proper
operation of your trimmer, 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.

Goggles Bottle of oil

Trimmer Lines

(2) Sets

(0,155 diameter

x 18,75 inches long)

TO REMOVETRIMMER FROM CARTON

• Remove loose parts included with trimmer,

• Cut down two end corners 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.

HOWTO SET UPYOURTRIMMER

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.

Handle knob

Lower handle J

::_ Upper handle

' "'- : Lift up

• • L

5

KNOW YOUR TRIMMER

READ THIS OWNER'S MANUAL AND 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 symbols mayappear on your trimmer or inliteraturesuppliedwiththe product.Leam and understand

their meaning.

AVOIDEiOI IMJI_IYOROEATN & @

FAST SLOW

FUEL OiL

Trimmer head control bar

Throttle control

Starter handle

Handle knob

Engine oil
cap w/

dipstick

Trimmer head control lever

3asoline cap

Engine
cover

Primer

Chassis

ver

i_ Trimmer head

IMPORTANT: This trimmer is shipped
WITHOUT OIL OR GASOLINE in the engine.

Trimmer head control bar - must be held
down to the handle to engage trimmer head.

Release to stop the trimmer head.
Primer - pumps additional fuel from the

carburetor to the cylinder for use when

starting a cold engine.

Trimmer line

Throttle control - used for starting and
stopping the engine and allows you to select

either fast or slow engine speed.
Starter handle - used for starting the engine.

Trimmer head control lever - used to

engage trimmer head.

6

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 USEYOURTRIMMER

ENGINE SPEED

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.

.= @

/ • ij

/•'¢_ ii - '_ _ -

Drive
control

lever

Trimmer head
control bar

To engage
trimmer head

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.

Adjustable

Trimme _!)

Head

TRIMMER HEAD DRIVE CONTROL
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;

/,

then release the lever.

• Trimmer head rotation will stop when _ t

the control bar is released.

7

\

\

\

\\

\

\

/

l

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 oil level before each use. Add oil if

needed. Fill to full line on 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.
AWARNING: 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.

,A 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

cap

Engine oil cap

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 runfor 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 /_i_
control _/\_. _.i_

Starter [_,,
handle fz L

TRIMMING TIPS

• Set the throttle control in the fast
position, tf 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.

8

.A,NTENANCESC.EDULE

F,.L,.O TES

ASYouCOM ,ETE ........

RE O'A.SE V,CE SE ,CEDATES

Check for Loose Fasteners If I/

T Clean Trimmer t/' if

Clean Under Engine Cover I/2 I/'

M Check drive belt/pulleys I_

R Check/Replace Trimmer Lines I,/3

Check Engine Oil Level i/

E Change Engine Oil V'1,2

N Clean Air Filter V' 2

I Inspect Muffler If

N Clean or Replace Spark Plug V'

Replace Air Filter Paper Cartridge V'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 condilions

3 - Replace trimmer lines when they have worn to half their originat tength

GENERAL RECOMMENDATIONS

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:

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.

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

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. Hemove 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.

Trimmer

line

/

Carrier plate
opening

,_tainer

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.

I

=F .20 0 6(3_ 80- 100 _

t SAE VISCOSITY GRADES

°C -30- -20' -_0' Q' 10' 20_ 30_

TEMPERATURE RANGE ANTICIPATED BEFOrE-NEXT O_'C_-ANGE

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 ENGINE OIL

NOTE: Before tipping trimmer to drain
oil, drain fuel tank by running engine
until fuel tank is empty.

1. Disconnect spark plug wire from spark
plug and place wire where it cannot
come in contact with spark plug.

2. Remove engine oil cap; lay aside on a

clean surface.

3. Tip trimmer on its side as shown and

drain oil into a suitable container,

Rock trimmer back and forth to
remove any 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 Operation section of this manual).

6. Replace engine oil cap.

7. Reconnect spark plug wire to spark

plug.

Turn

Collar

clockwise

to remove

Air filter
cover

Turn

counterclockwise to

tighten

MUFFLER

Inspect and replace corroded muffler as

it could create a fire hazard and/or

damage.

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.

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.

_t,CAUTION: Disconnect spark plug wire

from spark plug and place wire where it

cannot come in contact with the spark
p_ug.

• 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

cover

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

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 "TO ADJUSTTRIMMING 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.

Housing
slots

Upper

//

I!

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.

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 or
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.

Chassis_.

Belt

Screw

Chassis
cover

Top belt ""
keeper Bolt

Engine
pulley

Nut

Idler

Spacer

V-idler

Idler
bracket

Flatidler

_Bottom belt

keeper

Flat idler

. Trimmer

head pulley

Immediately prepare your trimmer for storage

at the end of the season or ifthe unit will not

be used for 30 days or more.

TRIMMER
When trimmer isto be stored for a period of

time, clean it thoroughly,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 yourtrimmer 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.

.. ;_.

Upper _ '_1

handle _"... ! "_

,.. ".._

Handle knob

ENGINE
FUEL SYSTEM

IMPORTANT: Itis 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.

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.

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.

ENGINEOIL

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 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.

IMPORTANT: Never cover trimmer while
engine and exhaust areas are still warm.
_,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.

14

TROUBLESHOOTING

CAUSEPROBLEM

CORRECTION

Does not start

1. Dirty air filter.

2. Out of fuel.

3. Stale fuel.

1. Clean/replace air filter.

2. Fill fuel tank.

3. Drain tank and refill with
fresh clean fuel.

4. Water in fuel.

4. Drain fuel tank and
carburetor and refill tank

with fresh gasoline.

5. Spark plug wire is

5. Connect wire to plug.

disconnected.

6. Bad spark plug.

7. Throttle control lever not
in correct position

6. Replace spark plug.

7. Move throttle lever to FAST
position.

(if equipped).

Loss of power

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. Clean/replace air filter.

2. Clean underside of trimmer
and trimmer head.

3. Check oil level.

4. Trim at slower walking

speed.

Excessive 1. Lines uneven or broken. 1. Check trimmer lines.
Vibration 2. Loose nuts or bolts. 2. Check all hardware,

including engine bolts.

3. Damaged trimmer head. 3. Check/repair trimmer head.

Starter rope hard 1. Bent engine crankshaft. 1. Contact a Sears or other
topull qualified service center.

Loss of head 1. Belt not driving. 1. Put belt on pulleys or
drive replace belt if broken.

Hard to push 1. Handle height position not 1. Adjust handle height

right for you. to suit.

Poor trimming 1. Trimmer line length is
performance too short.

1. If line is worn or broken to
half original length,

replace line.

2. Throttle control lever not
in correct position

2. Move throttle lever to FAST
position.

(if equipped).

Trimmer head

does not
retain line

1. Trimmer line not
properly installed.

2. Broken line retainer clip.

1. Follow instructions in
Maintenance section.

2. Replace string carrier plate
assembly.

3. Incorrect size of
trimmer line.

3. Use .155 diameter
trimmer line.

15

CRAFTSMAN WEED TRIMMER- - MODEL NO. 917.773420

6

29

30

19

5

20

10

28

15

14 8

26 23

18

21

11

26

27

9

25

" 24

27

24

25

30

CRAFTSMAN WEED TRIMMER- - MODEL NO. 917.773420

KEY PART
NO. NO. DESCRIPTION

1 Engine Model No. 143.005512

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 HandleBolt
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 Hex Washer Screw

22 172225X004 Axle Shaft Assembly
23 150078 Screw hex Wshd 5/16-18 x .75

24 169823 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

- - 169803 Safety Goggles (Not Shown)

- - 174041 Owner's Manual

(See Breakdown)

Available accessories not included with trimmer:

7133623 Gas Can (2.5 gal.)
71 33000 SAE 30W Oil (20 oz.)
7_79997 Trimmer Line (Pack of 24 strings,. 155 dia.)

31

CRAFTSMAN WEED TRIMMER- - MODEL NO. 917.773420

14

43

\

20

43

4

23

24

25

-- 26

18_. J

H

I

i

19 17

0--31

27

32

--36

W--337

32

CRAFTSMAN WEED TRIMMER-- MODEL NO. 917.773420

KEY PART
NO. NO. DESCRIPTION

1 174031X558 Chassis Assembly

2 169802 Line .155Dia x 18.75 •
3 173715 Screw 5/16-16 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 125

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 ReturnSpring

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 Nut 3/8-24UNF
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 40mm Internal

38 172523 Mow Ball
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

416

135

130

120

209_ 200

I/

/

119

126

125

101

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
59 37130

70 34311E

72 36083
75 27897

30 30574A

31 30590A

32 30591
33 30588A

36 650488
39 610961
)0 611213

)2 650815

33 650816

00 34443B
01 610118
03 651007

04 37480
10 36230
19 36787

20 36825

25 37288

26 37289
30 6021A
35 35395

50 31672
51 31673
51A 40017
69 36783

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

128) 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 T-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. 287 650926

46) 290 34357
Connecting Rod Bolt 292 26460

Valve Lifter 298 28763
Camshaft (Exhaust MCR)(Ine. 300 35586

Ref 104) 301 36246

Oil Pump Ass'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

KEY PART

NO. NO. 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

(_\20A

25__

_m37

--36

(_37

4O

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 We!I

Welch Plug, Atmospheric Vent

Repair kit (Incl. Items Marked *)

37

CRAFTSMAN 4-CYCLE ENGINE MODEL NO. 143.005512

12

tl

13

8

KEY PART

NO. NO.

590702

1

590599A

2

590600

3

590696

4

590601

5

590697

6

590698

7

590699

8

590700

11

590703

12

590535

13

590701

61_ O 6

4

3

5

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

_'--14

12

/

13

--6

KEY
NO.

0
3

6
7

8

11

12

13
14

PART
NO.

590739
590740
590616
590617
590618A

590638
590535

590701
590760

ill I! -7

DESCRIPTION

Rewind Starter
Retainer

Starter Dog
Dog Spring
Pulley & Rewind Spring Ass'y

Starter Housing Ass'y (40
degree 9rommet)

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-HOM E 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 PartsDireclSM!

1-800-366-PART 6 a.m.- 11 p.m. CST,

(1-800-366-7278) 7 days a week

www.sears.com/partsdirect

To purchase or inquire about a Sears Service Agreement:

1-800-827-6655

7 am.- 5 p.m. CST, Mon.- Sat.

Para pedir servicio de reparaci6n a domicilio,

y para ordenar piezas con entrega a domiciEio:

1-888-SU-HOGAR s_

(1-888-784-6427)

[ Ho_m_ee/C_er_tradiis_}

© Sears, Roebuck and Co.

® Registered Trademark / TMTrademark of Sears, Roebuck and Co.
® Marca Registrada / _MMarca de Fabrica de Sears, Roebuck and Co.

Au Canada pour service en fran(;ais:

1-877-LE-FOYER s_,

(1-877-533-6937)

174041 Rev.5 06.15.00 VB/rad Printed in U.S.A.