Page 1
Owner’s Manual
5.5 HORSEPOWER 22 INCH CUT
WHEELED
WEEDTRIMMER
Model No.
917.773420
Safety
Assembly
Operation
Maintenance
Español
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
Page 2
TABLE OF CONTENTS
Warranty
Safety Rules
Assembly 5
Operation
Maintenance Schedule
Maintenance
2
Product Specifications
2
Service and Adjustments
Storage
6
Troubleshooting
9
Repair Parts
9
Parts Ordering
Back Cover
WARRANTY
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.
9
12
14
15
30
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).
Page 3
SAFETY RULES
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.
A
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 famiiiar 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.
Page 4
^1
SAFETY BOtES <CONT.)
A
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,
III. 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, light 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.
Alook for this symbol to point out impor
tant safety precautions. It means CAU
TION!!! BECOME AWARE!!! YOUR
SAFETY !S 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.
^WARNING: The engine exhaust from
this product contains chemicals known to
the State of California to cause cancer,
birth defects, or other reproductive harm.
Page 5
ASSEMBLY
Read these instructions and this manual in its
entirety before you attempt to assemble or
operate your new trimmer.
IMPOFITANT: 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
Goggles
20 02.
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 UNFOLD HANDLE
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
Upper handle
Lift up
Page 6
dM*ERATION
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 adjustments. Save this manual for future reference.
These symbols may appear on your trimmer or in literature supplied with the product. Learn and understand
their meaning.
A WARNING
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00 Acnoss SLOPES NOT UP AND
DOWN.
* КШ* SAFHY DEVICES. SUCH AS GUARDS AND
oerbctors. m place and QPSWING.
• LOOK DOWN AND BEHIHO BEFORE AND WHILE
MOVING BACKWARDS.
A
CAUTION
i
FUEL OIL
Trimmer head control bar
Throttle control
Starter handle
Handle knob
Engine oil
cap w/
dipstick
Trimmer head control lever
Gasoline cap
Engine
cover
Primer
Chassis
cover
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.
Page 7
WEAR YOUR
F SAFETT^SSES J
FORESIGHT IS BEHER
THAN NO SIGHT
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 YOURTRIMMER
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.
Drive
control
lever
control bar
To engage
trimmer head
TO ADJUST TRIMMING HEIGHT
^CAUTION: Stop the engine and wait
Trimmer head
disengaged
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
Your trimmer is equipped with a trimmer
head drive control bar and lever which
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
the control bar is released.
Adjustable
Trimmer
Head
Locking
Plate Tab
Page 8
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.
i^WARNING: Experience indicates that
alcohol blended fuels (called gasohol or
using ethanol or methanol) can attract
moisture which leads to separation and
formation of acids during storage. Acidic
gas can damage the fuel system of an
engine while in storage, To avoid engine
problems, the fuel system should be
emptied before storage 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
TO START ENGINE
1. To start a cold engine, push primer three
(3) times before trying to 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. Flold 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. /A_
Throttle
control
Starter
handle
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, wails, 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
Page 9
MAINTENANCE
Check for Loose Fasteners
Clean Trimmer
Clean Under Engine Cover
Check drive beltfpulleys
Check/Replace Trimmer Lines
Check Engine Oil Level
Change Engine Oil
Clean Air Filter
Inspect Muffler
Clean or Replace Spark Plug
Replace Air Filter Paper Cartridge
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 they have worn to halt their originai length.
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
✓
✓ ✓
✓ 2
✓ 3
✓
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.
✓
✓
✓
|/l.2
✓ 2
✓
✓
1/2
manual.
Some adjustments will need to be made
periodically to properly maintain your unit.
All adjustments in the Service and
PRODUCT SPECIFICATIONS
Serial No.
Date of Purchase: .
_________________________________
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
Gasoline Type:
Gasoline Capacity:
Oil Type:
(API-SF/SG/SH)
Oil Capacity:
Spark Plug :
(Gap: .030")
Valve Clearance:
this manual.
BEFORE EACH USE
1. Check engine oil level.
Trimmer Line Dia.: .155 inch
Trimmer Line Length: 18.75 inches
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
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.
this section of Owner’s Manual.
Unleaded Regular
1.25 Quarts
SAE 30 (Above 32° F)
SAE 5W-30 (Below 32° F)
20 Ozs.
Champion J19LIVI
or RJ19LM
Intake: .004-.008
Exhaust: .004-.008
Page 10
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.
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.
Check all lines to be sure they are the
6.
same length.
7.
Reconnect spark plug wire to spark
plug.
Trimmer
line
Carrier plate
opening
Retainer
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.
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
Page 11
TO CHANGE ENGINE OIL
NOTE; Before tipping trimmer to drain
oil, drain fuel tank by running engine
until fuel tank is empty.
Disconnect spark plug wire from spark
1.
plug and place wire where it cannot
come in contact with spark plug.
2.
Remove engine oil cap; lay aside on a
clean surface.
Tip trimmer on its side as shown and
3.
drain oil into a suitable container.
Rock trimmer back and forth to
remove any oil trapped inside of
engine.
Wipe off any spilled oil on trimmer and
4.
on side of engine.
Fill engine with oil (See “ADD OIL" in
5.
the Operation section of this manual).
Replace engine oil cap.
6.
7.
Reconnect spark plug wire to spark
plug.
Turn
Collar
counterclockwise to
tighten
clockwise
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.
Remove filter from inside of cover.
2.
Clean the inside of the cover and the
3.
collar to remove any dirt accumula
tion.
Insert new filter into cover.
4.
Put air filter cover and filter into collar
5.
aligning the tab with the slot.
Push in on cover and turn counter
6.
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.
^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
Page 12
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
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.
SERVICE AND ADJUSTMENTS
A 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 ADJUST 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.
12
Page 13
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 fuei cap up.
4. Remove beit 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.
Top belt
keeper
Flat idler
Bottom belt
keeper
Flat idler
Trimmer
head pulley
Page 14
STORAGE
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 it thoroughly, remove ail dirt,
grease, leaves, etc. Store ip 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.
Upper
handle
Handle knob
ENGINE
FUELSYSTEM
IMPORTANT: It is important to prevent gum
deposits from forming in essential fuel system
parts such as carburetor, fuel filter, fuel hose
or tank during storage. Also, experience
indicates that alcohol blended fuels (called
gasohol or using ethanol or methanol) can
attract moisture which leads to separation and
formation of acids during storage. Acidic gas
can damage the fuel system of an engine
while in storage.
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.
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 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
Page 15
TROUBLESHOOTING
PROBLEM CAUSE
CORRECTION
Does not start
Loss of power
Excessive
Vibration
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. 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.
Starter rope hard
to pull
Loss of head
drive
Hard to push
Poor trimming
performance
Trimmer head
does not
retain line
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. 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
Page 16
REPAIR PARTS
CRAFTSMAN WEED TRIMMER- - MODEL NO. 917.773420
30
Page 17
CRAFTSMAN WEED TRIMMER- - MODEL NO. 917.773420
KEY PART
NO.
10
11 170980
12 136376
13 170681
14 170682
15
16
17
18
19 171449
20 174038
21
22
23 150078
24 169823
25 57143
26 151161 Wheel 14x2
27 83923 Hex Flange Locknut 3/8-16
28
29 174034
30 174039
NO.
1
2 150406
169791
3
STD502502
4
174317
5
174274 Engine Cover Knob
6
7 174030
169821X479
8
9 150078
169797X479
170554
153638 Rope Guide
STD541025 Locknut 1/4 X 20
66426 Wire Tire
158755
172225X004 Axle Shaft Assembly
174037 Drive Control
- -
169803
- -
174041
DESCRIPTION
Engine Model No. 143.005512
(See Breakdown)
Engine Bolt 3/8-16
Engine Pulley (Includes setscrew)
Setscrew, Pulley
Engine Cover w/screen
Engine Cover Stud
LowerHandle
Screw Hx Wshd 5/16-18 x .75
UpperHandle
Handle Bolt
Handle Knob
Handle Adjuster (Inside)
Handle Adjuster (Outside)
Handle Adjust Spring
Control Bar
Throttle Control
Hex Washer Screw
Screw hex Wshd 5/16-18 x .75
Axle Spacer
Wave Washer
Decal - Warning
Decal - Engine Cover
Safety Goggles (Not Shown)
Owner's Manual
Available accessories not included with trimmer:
Z133623 Gas Can (2.5 gal.)
7133000 SAE SOW Oil (20 oz.)
71 79997 Trimmer Line (Pack of 24 strings.
31
155 dia.)
Page 18
CRAFTSMAN WEED TRIMMER- - MODEL NO. 917.773420
32
Page 19
CRAFTSMAN WEEDTRIMMER- MODEL N0.917.773420
KEY
NO.
10
11
12
13
14
15 173811
16 170552
17
18 85768
19
20 170553
21
22 STD541137
23 STD551137
24
25
26 172551
27
28
29
30
31
32
33
34
36
37
38
39 172636
40
41
43 174042
44
45
PART
NO.
1
174031X558
2
169802
3
173715
4
169790
5 172145X004
6 166042
7
173716
8 751592
9
166043
160829
155552
173717 Spacer
142748
145212
57808
169800 Skirt
149746
STD551037
169792
174549
172520
169766
174543
174581
176973
172519 Locking Plate
174544
172516 Cover, Bearing
174580
172523 Mow Ball
172342
174029
174035
174596
DESCRIPTION
Chassis Assembly
Line .155Dia X 18.75
Screw 5/16-18 X ISeif TappingBeitV
Idler Bracket
Idler Pulley V-Groove
Hex Bolt 3/8-16 X 1.25
Hex Locknut 3/8-16
Idler Pulley-Flat
Shoulder Bolt
Locknut 5/16-18
Shoulder Bolt
Flange Locknut
Return Spring
Debris Shield
Screw 1/4-20 x 1/2
Screw #10-24x3/4
Chassis Cover-Top
Screw #10-24 X 1-3/4
NUI3/8-24UNF
Lockwasher 3/8
Fla1washer3/8
Puliey - Driven
Spacer - Puiley
Bearing
Jackshaft
Cover, Bottom
Spindle Hsg. Asm. (* Includes Upper Bearing Key No. 27)
Retaining Ring 17mm External
Spring, Lock Plate
Carrier Plate Assembly
Retaining Ring 40mm Internal
Bolt, Mow Ball
Head Assembly Complete (Includes Key Nos. 22-39)
Spacer
Decal - Instruction
Decal - Chassis Cover
Bottom Belt Keeper
33
Page 20
CRAFTSMAN 4-CYCLE ENGINE MODEL NO. 143.005512
34
Page 21
CRAFTSMAN 4-CYCLE ENGINE
MODEL NO. 143.005512
KEY PART
NO. NO.
1
37266
26727
2
33734
6
36557
7
12
36775
12A
36558
12B
36694
14
28277
15
30589
34839A
16
17
31335
651018
18
19
37329
32600
20
30
37459
40027
40
40
40028
41 40025
41 40026
42 40006
42 40007
43 20381
45 36777
46 32610A
48 27241
50 37460
29914
52
39
37130
34311E
70
72
36083
27897
75
30574A
30
31
30590A
32
30591
33
30588A
650488
36
39
610961
611213
30
650815
)2
650816
¡3
00
34443B
610118
01
651007
03
04 37480
10 36230
19 36787
20 36825
25 37288
26 37289
30 6021A
35 35395
50 31672
51 31673
51A 40017
69 36783
DESCRIPTION
Cylinder (Incl. 2,20 & 150)
Dowel Pin
Breather Element
Breather Ass’y- (Incl. 6 & 12A)
Breather Tube
Breather Cover & Tube (Incl.
128)
Breather Tube Elbow
Washer
Governor Rod (Incl. 14)
Governor Lever
Governor Lever Clamp
Screw, Torx T-15, 8-32 x 19/
64"
Extension Spring
Oil Seal
Crankshaft
Piston, Pin & Ring Set (Std.)
Piston, Pin & Ring Set (.010"
OS)
Piston & Pin Ass'y. (Std.) (Incl.
43)
Piston & Pin Ass’y. (.010" OS)
(Incl. 43)
Ring Set (Std.)
Ring Set (.010" OS)
Piston Pin Retaining Ring
Connecting Rod Ass’y. (Incl.
46}
Connecting Bod Bolt
Valve Lifter
Camshaft (Exhaust MCR)(lnc.
Ref 104)
Oil Pump Ass’y.
Mounting Flange Gasket
Mounting Flange (Incl. 72 thru
83,306)
Oil Drain Plug
Oil Seal
Governor Shaft
Washer
Governor Gear Ass’y. (Incl. 81)
Governor Spool
Screw, 1/4-20 X 1-1/4"
Flywheel Key
Flywheel
Belleville Washer
Flywheel Nut
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.
172 36784
174 30200
178 29752
179 30593
182 6201
184 26756
185 36785
186 36201
200 37134
206 610973
207 36200B
209 30200
223 650451
224 36786
238 650932
239 34338
241 36919
245 36905
250 37122
260 37213A
261 30200
262 650831
275 36790A
277 650988
285 35000A
287 650926
290 34357
292 26460
298 28763
300 35586
301 36246
305 35577
306 36996
307 35499
309 650562
310 35578
313 34080
370C37318
380 640262
390 590739
400 36792B
416 36085
417 650821
900
------------
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
"0’’-Ring
"0”-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
Page 22
CRAFTSMAN 4-CYCLE ENGINE
■^20 A
MODEL NO. 143.005512
48 36A
^ O I
25
36
Page 23
CRAFTSMAN 4-CYCLE ENGINE
PART
KEY
NO.
NO.
_
640262
631615
1
631767
2
631184 *
4
631183 *
5
640070
6
650506 ‘ Shutter Screw
7
631807 Fuel Fitting
16
17 651025
630766 Tension Spring
18
640018
20
20A 640200
631867 Float Bowl
25
631024 ‘ Float Shaft
27
28 632019
631028 * Float Bowl “0” Ring
29
631021 *
30
631022 Spring Clip
31
35 640259
36 640080
36A 632766
37 632547 *
640175 High Speed Bowl Nut
40
44 27110A * Bowl Nut Washer
47
630748
631027 * Welch Plug, Atmospheric Vent
48
632760B
60
DESCRIPTION
Carburetor (tncl. 184 of Engine Parts List)
Throttle Shaft & Lever Assembly
Throttle Return Spring
Dust Seal Washer
Dust Seal (Throttle)
Throttle Shutter
Throttle Crack Screw/ldle Speed Screw
Idle Restrictor Screw
Idle Restrictor Scrwe Cap (Black)
Float
Inlet Needle, Seat, & Clip (Incl. 31)
Primer Bulb/Retainer Ring
Main Nozzle Tube
Carburetor Tube
“0” Ring, Main Nozzle Tube
Welch Plug, idle Mixture Welt
Repair kit (Incl. Items Marked *)
MODEL NO. 143.005512
37
Page 24
CRAFTSMAN 4-CYCLE ENGINE
MODEL NO. 143.005512
11
KEY
PART
NO.
NO.
_
590702
1
590599A
2
590600 Washer
3
590696 Retainer
4
590601 Washer
5 590697
6
590698 Starter Dog
7
590699 Dog Spring
8 590700
11
590703
12
590535
13
590701 Starter Handle
O 2
0
DESCRIPTION
Recoil Starter
Spring Pin (Incl. 4)
Brake Spring
Pulley & Rewind Spring Ass'yStarter Housing Ass'y. (40 degree grommet)
Starter Rope ( 98" X 9/64" dia.)
38
Page 25
CRAFTSMAN 4-CYCLE ENGINE
MODEL NO. 143.005512
KEY
PART
NO. NO.
0
590739
3
590740
6
590616
7
590617
8
590618A
11
590638
12
590535
13
590701
14
590760
----
7
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
64" dia.)
Starter Handie
Spring Ciip
9/
39
Page 26
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^^ 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“1 222 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 PartsDirect®'^!
1 -800-366-PART 6 a m - 11 p m CST,
(1-800-366-7278) 7 days a week
To purchase or inquire about a Sears Service Agreement:
Para pedir servicio de reparación a domicilio,
y para ordenar piezas con entrega a domicilio:
1-888-SU-HOGAR^“
(1-888-784-6427)
> Sears, Roebuck and Co.
www.sears.com/partsdirect
1-800-827-6655
7 a.m. - 5 p.m. CST, Mon. - Sat.
Au Canada pour service en français;
1-877-LE-FOYER®“
(1-877-533-6937)
HomeCentral
® Registered Trademark / ™ Trademark of Sears, Roebuck and Co.
® Marca Registrada / Marca de Fábrica de Sears, Roebuck and Co.
174041 Rev.5 06.15.00 VB/rad
Printed in U.S.A.
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