Craftsman 316.79199 User Manual
Sears, Roebuck and Co., Hoffman Estates, IL 60179, U.S.A.
Visit our website: www.sears.com/craftsman
CAUTION: Before using this
product, read this manual and
follow all safety rules and
operating instructions.
Operator’s Manual
4-Cycle
WEEDWACKER
®
GAS TRIMMER
Model No. 316.791990
• SAFETY
• ASSEMBLY
• OPERATION
• MAINTENANCE
• PARTS LIST
• ESPAÑOL, P. 15
P/N 769-03874 2/08
2
• IMPORTANT SAFETY INSTRUCTIONS •
READ ALL INSTRUCTIONS BEFORE OPERATING
• Read the instructions carefully. Be familiar with the controls and
proper use of the unit.
• Do not operate this unit when tired, ill, or under the influence of
alcohol, drugs, or medication.
• Children and teens under the age of 15 must not use the unit,
except for teens guided by an adult.
• All guards and safety attachments must be installed properly
before operating the unit.
• Inspect the unit before use. Replace damaged parts. Check for fuel
leaks. Make sure all fasteners are in place and secure. Replace parts
that are cracked, chipped, or damaged in any way. Do not operate the
unit with loose or damaged parts.
• Carefully inspect the area before starting the unit. Remove all
debris and hard or sharp objects such as glass, wire, etc.
• Be aware of the risk of injury to the head, hands and feet.
•
Clear the area of children, bystanders, and pets. At a minimum, keep all
children, bystanders, and pets outside a 50 feet (15 m.) radius; there
still may be a risk to bystanders from thrown objects. Bystanders
should be encouraged to wear eye protection. If you are approached,
stop the unit immediately.
• Use only Craftsman Hassle-Free™ XTRA QUIET Spiral
Lineoriginal equipment manufacturer replacement line. Never use
metal-reinforced line, wire or rope. These can break off and become
dangerous projectiles.
• Squeeze the throttle control and check that it returns automatically to
the idle position. Make all adjustments or repairs before using unit.
SAFETY WARNINGS FOR GAS UNITS
• Store fuel only in containers specifically designed and approved
for the storage of such materials.
• Avoid creating a source of ignition for spilled fuel. Do not start the
engine until fuel vapors dissipate.
• Always stop the engine and allow it to cool before filling the fuel tank.
Never remove the cap of the fuel tank, or add fuel, when the engine
is hot. Never operate the unit without the fuel cap securely in place.
Loosen the fuel tank cap slowly to relieve any pressure in the tank.
•
Add fuel in a clean, well-ventilated outdoor area where there are no
sparks or flames. Slowly remove the fuel cap only after stopping engine.
Do not smoke while fueling. Wipe up any spilled fuel from the unit
immediately. Always wipe unit dry before using.
•
Move the unit at least 30 feet (9.1 m) from the fueling source and site
before starting the engine. Do not smoke or allow sparks and open
flames near the area while adding fuel or operating the unit.
WHILE OPERATING
• Never start or run the unit inside a closed room or building. Breathing
exhaust fumes can kill. Operate this unit only in a well ventilated
outdoor area.
•
Wear safety glasses or goggles that are marked as meeting ANSI
Z87.1-1989 standards. Also wear ear/hearing protection when
operating this unit. Wear a face or dust mask if the operation is dusty.
Long sleeve shirts are recommended.
All information, illustrations, and specifications in this manual are based
on the latest product information available at the time of printing. We
reserve the right to make changes at any time without notice.
TABLE OF CONTENTS
Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Oil and Fuel Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Starting/Stopping Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Maintenance and Repair Instructions . . . . . . . . . . . . . . . . . . . . . . .7
Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Service Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back Cover
RULES FOR SAFE OPERATION
SPARK ARRESTOR NOTE
NOTE: For users on U.S. Forest Land and in the states of California,
Maine, Oregon and Washington. All U.S. Forest Land and the state of
California (Public Resources Codes 4442 and 4443), Oregon and
Washington require, by law that certain internal combustion engines
operated on forest brush and/or grass-covered areas be equipped with a
spark arrestor, maintained in effective working order, or the engine be
constructed, equipped and maintained for the prevention of fire. Check
with your state or local authorities for regulations pertaining to these
requirements. Failure to follow these requirements could subject you to
liability or a fine. This unit is factory equipped with a spark arrestor. If
it requires replacement, ask your LOCAL SERVICE DEALER to install the
Accessory Part #753-05810 Spark Arrestor Kit.
CALIFORNIA PROPOSITION 65 WARNING
WARNING
THE ENGINE EXHAUST FROM THIS PRODUCT CONTAINS
CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE
CANCER, BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM.
Read the Operator’s Manual and follow all warnings and safety
instructions. Failure to do so can result in serious injury to the operator
and/or bystanders.
FOR QUESTIONS, CALL 1-800-659-5917
SYMBOL MEANING
WARNING:
Failure to obey a safety warning can result in
injury to yourself and others. Always follow the safety precautions
to reduce the risk of fire, electric shock and personal injury.
CAUTION:
Failure to obey a safety warning may result in
property damage or personal injury to yourself or to others.
Always follow the safety precautions to reduce the risk of fire,
electric shock and personal injury.
The purpose of safety symbols is to attract your attention to possible
dangers. The safety symbols, and their explanations, deserve your
careful attention and understanding. The safety warnings do not by
themselves eliminate any danger. The instructions or warnings they
give are not substitutes for proper accident prevention measures.
SAFETY ALERT:
Indicates danger, warning or caution.
Attention is required in order to avoid serious personal
injury. May be used in conjunction with other symbols or
pictographs.
NOTE: Advises you of information or instructions vital to the
operation or maintenance of the equipment.
DANGER:
Failure to obey a safety warning will result in
serious injury to yourself or to others. Always follow the
safety precautions to reduce the risk of fire, electric shock
and personal injury.
WARNING:
Gasoline is highly flammable and its vapors
can explode if ignited. Take the following precautions:
3
RULES FOR SAFE OPERATION
• Wear heavy, long pants, boots and gloves. Do not wear loose
clothing, jewelry, short pants, sandals or go barefoot. Secure hair
above shoulder level.
• The cutting attachment shield must always be in place while
operating the unit. Do not operate unit without both trimming lines
extended, and the proper line installed. Do not extend the
trimming line beyond the length of the shield.
• This unit has a clutch. The cutting attachment remains stationary
when the engine is idling. If it does not, have the unit adjusted by
an authorized service technician.
• Adjust the D-handle to your size to provide the best grip.
• Be sure the cutting attachment is not in contact with anything
before starting the unit.
• Use the unit only in daylight or good artificial light.
• Avoid accidental starting. Be in the starting position whenever
pulling the starter rope. The operator and unit must be in a stable
position while starting. See Starting/Stopping Instructions.
• Use the right tool. Only use this tool for the purpose intended.
• Do not overreach. Always keep proper footing and balance.
• Always hold the unit with both hands when operating. Keep a firm
grip on both the front and rear handle or grips.
• Keep hands, face, and feet at a distance from all moving parts. Do
not touch or try to stop the cutting attachment when it is rotating.
•
Do not touch the engine or muffler. These parts get extremely hot from
operation. They remain hot for a short time after you turn off the unit.
•
Do not operate the engine faster than the speed needed to cut, trim or
edge. Do not run the engine at high speed when you are not cutting.
• Always stop the engine when cutting is delayed or when walking
from one cutting location to another.
•
If you strike or become entangled with a foreign object, stop the engine
immediately and check for damage. Do not operate before repairing
damage. Do not operate the unit with loose or damaged parts.
• Stop and switch the engine to off for maintenance, repair, or for
changing the cutting attachment or other attachments.
• Use only original equipment manufacturer replacement parts and
accessories for this unit. These are available from your authorized
service dealer. Use of any unauthorized parts or accessories
could lead to serious injury to the user, or damage to the unit, and
void your warranty.
• Keep unit clean of vegetation and other materials. They may
become lodged between the cutting attachment and shield.
• To reduce fire hazard, replace faulty muffler and spark arrestor,
keep the engine and muffler free from grass, leaves, excessive
grease or carbon build up.
OTHER SAFETY WARNINGS
• Never store the unit, with fuel in the tank, inside a building where
fumes may reach an open flame or spark.
• Allow the engine to cool before storing or transporting. Be sure to
secure the unit while transporting.
• Store the unit in a dry area, locked up or up high to prevent
unauthorized use or damage, out of the reach of children.
• Never douse or squirt the unit with water or any other liquid. Keep
handles dry, clean and free from debris. Clean after each use. See
the Cleaning and Storage instructions.
•
Keep these instructions. Refer to them often and use them to instruct other
users. If you loan someone this unit, also loan them these instructions.
SAVE THESE INSTRUCTIONS
This operator's manual describes safety and international symbols and pictographs that may appear on this product. Read the operator's
manual for complete safety, assembly, operating and maintenance and repair information.
• SAFETY & INTERNATIONAL SYMBOLS •
SYMBOL MEANING SYMBOL MEANING
• SAFETY ALERT SYMBOL
Indicates danger, warning or caution. May be used in
conjunction with other symbols or pictographs.
• WARNING - READ OPERATOR'S MANUAL
Read the operator’s manual(s) and follow all warnings
and safety instructions. Failure to do so can result in
serious injury to the operator and/or bystanders.
• WEAR EYE AND HEARING PROTECTION
WARNING:
Thrown objects and loud noise can cause
severe eye injury and hearing loss. Wear eye protection
meeting ANSI Z87.1-1989 standards and ear protection when
operating this unit. Use a full face shield when needed.
• UNLEADED FUEL
Always use clean, fresh unleaded fuel
• ON/OFF STOP CONTROL
ON / START / RUN
• ON/OFF STOP CONTROL
OFF or STOP
• HOT SURFACE WARNING
Do not touch a hot muffler or cylinder. You may get
burned. These parts get extremely hot from operation.
When turned off they remain hot for a short time.
• KEEP BYSTANDERS AWAY
WARNING: Keep all bystanders, especially children
and pets, at least 50 feet (15 m.) from the operating area.
• THROWN OBJECTS AND ROTATING CUTTER CAN
CAUSE SEVERE INJURY
WARNING: Small objects can be propelled at high
speed, causing injury. Keep away from the rotating rotor.
• PRIMER BULB
Push primer bulb, fully and slowly, 10 times.
• OIL
Refer to operator’s manual for the proper type of oil.
• SHARP BLADE
WARNING:
Sharp blade on trimmer attachment shield.
To prevent serious injury, do not touch the line cutting blade.
APPLICATIONS
As a trimmer:
• Cutting grass and light weeds.
• Edging
• Decorative trimming around trees, fences, etc.
4
CRAFTSMAN PROFESSIONAL FULL WARRANTY
If this Craftsman Professional product fails due to a defect in material or workmanship within three years from the date of purchase, return it
to any Sears store, Parts and Repair Service Center, or other Craftsman outlet in the United States for free repair (or replacement if repair
proves impossible).
This warranty applies for only one year if this product is ever used for commercial or rental purposes.
This warranty covers ONLY defects in material and workmanship. Sears will NOT pay for:
• Expendable items which can wear out from normal use within the warranty period, such as cutting line, air cleaner or spark plug.
• Repairs necessary because of accident or failure to operate or maintain the product according to all supplied instructions.
• Preventive maintenance, product tune-ups, or carburetor cleanings or adjustments.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Sears, Roebuck and Co., Hoffman Estates, IL 60179
WARRANTY STATEMENT
KNOW YOUR UNIT
Cutting Head
Shield
Fuel Cap
D-Handle
Hassle Free®PLUS
Cutting Head
Shaft Grip
Shaft Housing
Starter
Rope Grip
Throttle Control
Air Filter
Cover
Spark Plug
Muffler
On/Off Stop Control
Shoulder
Strap
Loop
Primer Bulb
Line Cutting
Blade
INSTALL AND ADJUST THE D-HANDLE
1. Place D-handle over the
shaft housing and onto
the bottom clamp (Fig. 1).
Place it a minimum of 6
inches (15.24 cm) from
the end of the shaft grip.
2. Start screws with a large
Flat-head or T-25 Torx
screwdriver. Do not
tighten until you make the
handle adjustment.
ASSEMBLY INSTRUCTIONS
3. While holding the unit in the operating position (Fig. 13), move
the D-handle to the location that provides you the best grip.
4. Tighten the clamp screws
evenly, until the D-handle
is secure.
INSTALL THE SHOULDER
SUPPORT
1. Put the shoulder support
on using the clip. (Fig. 2).
Screws (4)
Shaft Grip
Minimum
6 in.
(15.24 cm)
Fig. 1
Bottom
Clamp
D-Handle
Fig. 2
Throttle
Lockout
Choke Lever
5
RECOMMENDED OIL TYPE
Using the proper type and weight of oil in the crankcase is extremely
important. Check the oil before each use and change the oil regularly.
Failure to use the correct oil, or using dirty oil, can cause premature
engine wear and failure.
Use a high-quality SAE 30 weight oil of API (American Petroleum Institute)
service class SF, SG, SH.
OIL & FUEL INFORMATION
5
WARNING:
OVERFILLING OIL CRANKCASE MAY
CAUSE SERIOUS PERSONAL INJURY. Check and maintain
the proper oil level in the crank case; it is important and
cannot be overemphasized. Check the oil before each use
and change it as needed. See Changing the Oil.
ADDING OIL TO CRANKCASE: INITIAL USE
NOTE: This unit is shipped without oil. In order to avoid damage to
the unit, put oil in the crankcase before you attempt to start
the unit.
Your unit is supplied with one 3.04 fluid oz. (90 ml.) bottle of SAE 30
SF, SG, SH oil (Fig. 6).
NOTE: Save the bottle of oil.
It can be used to
measure the correct
amount during future
oil changes. See
Changing the Oil.
1. Unscrew the top of the
bottle of oil and remove
the paper seal covering
the opening. Replace the
top. Next, cut the tip off
the funnel spout (Fig. 6).
2. Place unit on a flat, level
surface.
3.
Remove the oil fill plug from
the crankcase (Fig. 8).
4. Pour the entire bottle of oil
into the oil fill hole (Fig. 7).
NOTE: Never add oil to the
fuel or fuel tank.
5. Wipe up any oil that may
have spilled and reinstall
the oil fill plug.
Check oil before each use and
change as needed. Refer to
Checking the Oil Level.
RECOMMENDED FUEL
TYPE
Old fuel is the primary reason
for improper unit performance.
Be sure to use fresh, clean,
unleaded gasoline.
NOTE: Dispose of the old
gasoline in accordance to Federal, State and Local
regulations.
NOTE: This is a four cycle engine. In order to avoid damage to the
unit, do not mix oil with gasoline.
Definition of Blended Fuels
Today's fuels are often a blend of gasoline and oxygenates such as
ethanol, methanol or MTBE (ether). Alcohol-blended fuel absorbs
water. As little as 1% water in the fuel can make fuel and oil separate
or form acids when stored. Use fresh fuel (less than 60 days old),
when using alcohol-blended fuel.
Using Blended Fuels
If you choose to use a blended fuel, or its use is unavoidable, follow
recommended precautions:
• Always use fresh unleaded gasoline
• Use the fuel additive STA-BIL® or an equivalent
• Drain tank and run the engine dry before storing unit
Funnel
Spout
Fill Level
Fig. 6
O-Ring
Oil Fill Plug
Fig. 8
Oil Fill Hole
Fig. 7
ASSEMBLY INSTRUCTIONS
2. Adjust by lifting slightly on
the rear of the lower clip,
push or pull the loose end
of the strap length to fit
the operator’s size and
comfort. (Fig. 3).
3. Attach the shoulder clip
to the unit. (Fig. 4)
INSTALL THE CUTTING
HEAD SHIELD
1. Place the cutting head
shield onto the guard
mount bracket, making
sure to align the holes on
the shield with the ones in
the guard mount bracket.
(Fig. 5)
2. Take the 4 shield screws
and screw each one into
the shield until finger
tight.
3. Using a Flat Head or T-20
screw driver, tighten the
screws until the shield is
firmly in place. (Fig. 5)
Fig. 3
Fig. 4
Fig. 5
OIL & FUEL INFORMATION
Support
Clip
Adjustment
Ta b
Support
Fitting
Guard Mount
Bracket
Cutting
Head
Shield
Screws (4)
3. Fully press and
release the primer
bulb 10 times, slowly.
Some amount of fuel
should be visible in
the primer bulb and
fuel lines (Fig. 11). If
you can’t see fuel in
the bulb, press and
release the bulb as
many times as it
takes before you can
see fuel in it.
4. Place the choke lever
in Position 1 (Fig. 11).
5. Crouch in the starting
position (Fig. 12).
Press the throttle
lockout in and fully
squeeze the throttle
control lever. Pull the
starter rope 5 times.
6. Place the choke lever
in Position 2 (Fig. 11).
7. While pressing the throttle lockout in and squeezing the
throttle control , pull the starter rope 1 to 4 times to start
the engine.
8. Keep the throttle squeezed and allow the engine to warm
up for 15 to 30 seconds.
9. Place the choke lever in Position 3 (Fig. 11). The unit is
ready for use.
IF...
The engine does not start, go back to step 3.
IF...
The engine fails to start after a few attempts, place the
choke lever in Position 3, press the throttle lockout in
and squeeze the throttle control. Pull the starter rope 3 to
8 times. The engine should start. If not, repeat.
STOPPING INSTRUCTIONS
1. Release your hand from the throttle control. Allow the
engine to cool down by idling.
2. Press and hold On/Off Stop Control in the OFF (O) position
until engine comes to a complete stop (Fig. 10).
OPERATING INSTRUCTIONS
HOLDING THE TRIMMER
Before operating the unit, stand in the
operating position (Fig. 13). Check for
the following:
• The operator is wearing eye
protection and proper clothing
• With a slightly-bent right arm, the
operator’s right hand is holding the
shaft grip
• The operator’s left arm is straight, the
left hand holding the handle
• The unit is at waist level
• The cutting attachment is parallel to
the ground and easily contacts the
grass without the need to bend over
WARNING:
Always wear eye, hearing, foot and body
protection to reduce the risk of injury when operating this unit.
Fig. 13
6
OIL & FUEL INFORMATION
Using Fuel Additives
The use of fuel additives, such as STA-BIL® Gas Stabilizer or an
equivalent, will inhibit corrosion and minimize the formation of gum
deposits. Using a fuel additive can keep fuel from forming harmful
deposits in the carburetor for up to six (6) months. Add 0.8 oz. (23 ml.) of
fuel additive per gallon of fuel according to the instructions on the fuel
additive container. NEVER add fuel additives directly to the unit's gas tank.
FUELING THE UNIT
1. Remove the fuel cap (Fig. 9).
2. Place the gas container’s spout into the fill hole on the fuel tank
(Fig. 9) and fill the tank.
NOTE: Do not overfill the
tank.
3. Wipe up any gasoline that
may have spilled.
4. Reinstall the fuel cap.
5. Move the unit at least 30
ft. (9.1 m) from the fueling
source and site before
starting the engine.
WARNING:
Gasoline is extremely flammable. Ignited
vapors may explode. Always stop the engine and allow it
to cool before filling the fuel tank. Do not smoke while
filling the tank. Keep sparks and open flames at a distance
from the area.
WARNING:
Add fuel in a clean, well ventilated outdoor
area. Wipe up any spilled fuel immediately. Avoid creating
a source of ignition for spilt fuel. Do not start the engine
until fuel vapors dissipate.
Fuel Cap
Fuel Tank
Fig. 9
WARNING:
Remove fuel cap slowly to avoid injury from
fuel spray. Never operate the unit without the fuel cap
securely in place.
Gas Can Spout
STARTING INSTRUCTIONS
STARTING/STOPPING INSTRUCTIONS
WARNING:
Operate this unit only in a well-ventilated
outdoor area. Carbon monoxide exhaust fumes can be
lethal in a confined area.
WARNING:
Avoid accidental starting. Make sure you are
in the starting position when pulling the starter rope (Fig. 12).
To avoid serious injury, the operator and unit must be
in a stable position while starting.
1. Check the oil level in
the crankcase. Refer
to Checking the Oil
Level.
2. Fill the fuel tank with
fresh, clean unleaded
gasoline. Refer to
Fueling the Unit.
NOTE: There is no need
to turn the unit
on. The On/Off
Stop Control is in
the ON ( I ) position at all times (Fig. 10).
Start/On ( I )
Stop/Off (O)
Throttle Control
Fig. 10
Starting
Position
Throttle Control
Fig. 12
Primer Bulb
Fig. 11
STARTING/STOPPING INSTRUCTIONS
Choke Lever
7
TIPS FOR BEST TRIMMING RESULTS
• For best trimming results, operate unit at full throttle.
• Keep the cutting attachment parallel to the ground.
• Do not force the cutting attachment. Allow the tip of the line to do
the cutting, especially along walls. Cutting with more than the tip
will reduce cutting efficiency and may overload the engine.
• Cut grass over 8 inches (200 mm) by working from top to bottom
in small increments to avoid premature line wear or engine drag.
• Slowly move the trimmer into and out of the cutting area at the
desired height. Move either in a forward-backward or side-to-side
motion. Cutting shorter lengths produces the best results.
• Trim only when grass and weeds are dry.
• The life of your cutting line is dependent upon:
• Proper adherence of explained trimming techniques
• What vegetation is cut
• Where vegetation is cut
For example, the line will wear faster
when trimming against a foundation wall
as opposed to trimming around a tree.
DECORATIVE TRIMMING
Decorative trimming is accomplished by
removing all vegetation around trees,
posts, fences and more.
Rotate the whole unit so that the cutting
attachment is at a 30° angle to the
ground (Fig. 14).
7
MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the frequency
stated in the table. These procedures should also be a part of any
seasonal tune-up.
NOTE:
Some maintenance procedures may require special tools or
skills. If you are unsure about these procedures take your unit to
Sears or other qualified service dealer. Call 1-800-4-MY-HOME
®
for more information.
NOTE: Maintenance, replacement, or repair of the emission
control devices and system may be performed by a Sears
or other qualified service dealer. Call 1-800-4-MY-HOME
®
for more information.
MAINTENANCE & REPAIR INSTRUCTIONS
LINE REPLACEMENT
Always use Craftsman Hassle-Free™ XTRA QUIET Spiral Line.
Choose the line size best suited for the job at hand. Red colored line
is designed for cutting grass and small weeds. Black colored line is
designed for cutting larger weeds and light brush.
NOTE: Before inserting new
line into the holes in
the cutting head,
identify the proper
holes. Follow
directions as shown
on the glide plate. Do
Not attempt to
remove the cutting
head from the unit
when replacing line.
NOTE: Do not mix lines. Use
2 black or 2 red only.
1. Remove the old line and
line glide plate from the
cutting head.
2. Clean entire surface of
cutting head.
3. Reinstall line glide plate
(Fig. 15). The glide plate is
a keyed item and will only
fit one way. If it does not
go into the cutting head
smoothly, DO NOT force it.
Rotate the glide plate until
it slides into the cutting
head easily.
NOTE: The glide plate must
be installed in the
cutting head before
inserting new line.
4. Insert both ends of your line through the large holes in the side
of the cutting head (Fig. 16).
5.
Push and/or pull the line so that the line is snug against the hub and
is fully extended through the positioning tunnels. (Fig. 17)
6. Correctly installed line will be the same length on both sides.
NOTE: Make sure that when installing new line, that the line is as close
to even as possible. Any variation in lengths may cause the unit
to vibrate excessively. If this happens, stop the unit and make
sure the line is even.
7. Repeat steps 4 thru 6 to install the second trimmer line.
NOTE: Do not rest the Hassle-Free™ PLUS Cutting Head on the
ground while the unit is running.
Some line breakage will occur from:
• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick, stalky weeds
• Forcing the line into objects such as walls or fence posts
NOTE: During normal use the trimming line may become worn
unevenly which may cause excessive vibrations in the unit.
If this becomes uncomfortable or uncontrollable, stop the
unit and replace the line. Refer to the Line Replacement
instructions above.
WARNING:
To prevent serious injury, never perform
maintenance or repairs with unit running. Always service
and repair a cool unit.
Fig. 14
FREQUENCY MAINTENANCE REQUIRED SEE
Before starting
engine
Fill fuel tank with fresh fuel
Check oil
p. 4
p. 6
Every 10 hours Clean and oil air filter p. 5
Every 25 hours Change oil
Change oil
Clean spark arrestor and change oil
p. 5
p. 5
p. 6
Every 25 hours Check rocker arm to valve clearance
and adjust
Check rocker arm to valve clearance
and adjust
Check spark plug condition and gap
p. 6
p. 6
p. 6
OPERATING INSTRUCTIONS MAINTENANCE & REPAIR INSTRUCTIONS
Glide Plate
Cutting Head
Fig. 15
Large Holes
Fig. 16
Positioning Tunnel
Fig. 17
8
1. Open the air filter cover by
unscrewing the air filter
screw (Fig. 22).
2.
Remove the air filter (Fig. 25).
3. Wash the filter in detergent
and water (Fig. 24). Rinse
the filter thoroughly and
allow it to dry.
4. Replace the air filter into
the base plate (Fig. 25).
NOTE: If the unit is operated
without the air filter,
you will VOID the
warranty.
5. Reinstall the air filter
cover. Position the hooks
on the air filter cover to
the top of the back plate
and lower the air filter
cover down so that the air
filter screw aligns with the
screw hole on the back
plate (Fig. 23).
6. Turn the air filter screw
clockwise until the air filter
screw is tight (Fig. 22).
NOTE: Do not over tighten as
this may strip the
screw.
IDLE SPEED ADJUSTMENT
The idle speed of the engine is
adjustable. An idle adjustment
screw is between the air filter
cover and the engine starter
housing (Fig. 26).
NOTE: Careless adjustments
can seriously damage
your unit. Aside from
idle speed, only a Sears or other authorized service dealer
should make carburetor adjustments.
First, Check Fuel
Old fuel is usually the reason
for idle speed problems. Drain
and refill the tank with fresh
fuel prior to making any
adjustments. Refer to Oil and
Fuel Information.
Second, Clean Air Filter
The condition of the air filter is
important to the operation of
the unit. A dirty air filter will restrict air flow. This is often mistaken
for an out of adjustment idle. Check the condition of the air filter
before adjusting the idle speed screw. Refer to Air Filter
Maintenance.
Third, Adjust Idle Speed Screw
If, after checking the fuel and cleaning the air filter, the engine still
will not idle, adjust the idle speed screw as follows:
1. Start the engine and let it run at a high idle for a minute to warm
up. Refer to Starting/Stopping Instructions.
2. Release the throttle trigger and let the engine idle. If the engine
stops, insert a small phillips or flat blade screwdriver into the
hole in the air filter/muffler cover (Fig. 26). Turn the idle speed
screw in, clockwise, 1/8 of a turn at a time (as needed) until the
engine idles smoothly.
NOTE: The cutting attachment should not rotate when the engine
idles.
MAINTENANCE & REPAIR INSTRUCTIONS
CHECKING THE OIL LEVEL
The importance of checking and maintaining the proper oil level in the
crankcase cannot be overemphasized. Check oil before each use:
1. Stop the engine and allow
oil to drain into the
crankcase.
2. Place the unit on a flat,
level surface to get a
proper oil level reading.
3. Keep dirt, grass clippings
and other debris out of
the engine. Clean the area
around the oil fill plug
before removing it.
4. Remove the oil fill plug.
5. Check the oil level. Oil
should be just to the
bottom of the threads of
the oil fill hole. (Fig. 19).
6. If the level is low, add a
small amount of oil to the
oil fill hole and recheck
(Fig. 19). Repeat this
procedure until the oil
level reaches the the
bottom of the threads in
the oil fill hole.
NOTE: Do not overfill the unit.
NOTE: Make sure the O-ring
is in place on the oil fill
plug when checking
and changing the oil
(Fig. 18).
CHANGING THE OIL
For a new engine, change the oil after the first 25 hours of
operation. Change the oil while the engine is still warm. The oil will
flow freely and carry away more impurities.
1. Remove the oil fill plug.
2. Pour the oil out of the oil fill
hole and into a container by
tipping the unit to the side
(Fig. 20). Allow ample time
for complete drainage.
3. Wipe up any oil residue on
the unit and clean up any
oil that may have spilled.
Dispose of the oil
according to Federal, State and local regulations.
4. Refill the crankcase with 3.04 fluid ounce (90 ml) of SAE 30 SF,
SG, SH oil.
NOTE:
Use the bottle and spout saved from initial use to measure the
correct amount of oil. The top of the label on the bottle
measures approximately 3.04 ounces (90 ml) (Fig. 21). Check
the level (Fig. 19). If the level is low, add a small amount of oil
and recheck. Do not overfill.
5. Replace the oil fill plug.
AIR FILTER MAINTENANCE
Cleaning the Air Filter
Clean the air filter every 10 hours of operation. It is an important item
to maintain. Failure to maintain your air filter properly can result in poor
performance or can cause permanent damage to your engine.
WARNING:
To avoid serious personal injury, always turn
your unit off and allow it to cool before you clean or service it.
Fig. 20
Fig. 21
Fig. 22
O-Ring
Fig. 18
Oil Fill Plug
Oil Fill Hole
Fig. 19
Oil Full Line
Fig. 23
Fig. 24
Fig. 25
CAUTION:
Wear gloves to prevent injury when handling
the unit.
CAUTION:
Wear gloves to prevent injury when handling
the unit.
Fig. 26
WARNING:
The cutting attachment may spin during idle
speed adjustments. Wear protective clothing and observe
all safety instructions to prevent serious personal injury.
Add 1.4-1.5 Oz.
(41-44 ml)
Fill Line
Air Filter Cover
Air Filter
Screw
Air Filter Cover
Back Plate
Back Plate
Air Filter
Idle Adjustment Screw
8. If the clearance is not
within specification:
a.
Turn the adjusting nut using
a 5/16 inch (8 mm) wrench
or nut driver (Fig. 31).
• To increase clearance,
turn the adjusting nut
counterclockwise.
• To decrease clearance,
turn the adjusting nut
clockwise.
b. Recheck both clearances, and adjust as necessary.
9. Reinstall the rocker arm cover using a new gasket. Torque the
screw to 20–30 in•lb (2.2–3.4 N•m).
10. Check the spark plug and reinstall. See Replacing the Spark Plug.
11. Replace the spark plug wire.
12. Reinstall the engine cover. Check alignment of the cover before
tightening the screws. Tighten screws.
REPLACING THE SPARK PLUG
Use a replacement Champion
®
RDZ19H spark plug. The correct air
gap is 0.025 in. (0.635 mm). Remove the plug after every 25 hours of
operation and check its condition.
1. Stop the engine and allow it to cool. Remove the two (2) screws
on back of the engine cover and the one on the front of the
engine cover with a Flat-head or T-25 Torx screwdriver (Fig. 27).
2. Grasp the plug wire firmly and pull the cap from the spark plug.
3. Clean dirt from around the
spark plug. Remove the
spark plug from the
cylinder head by turning a
5/8 in. socket
counterclockwise.
4. Replace cracked, fouled
or dirty spark plug. Set
the air gap at 0.025 in.
(0.635 mm) using a feeler
gauge (Fig. 32).
5. Install a correctly-gapped spark plug in the cylinder head. Turn
the 5/8 in. socket clockwise until snug.
If using a torque wrench, torque to: 110-120 in.•lb. (12.3-13.5 N•m)
Do not over tighten.
SPARK ARRESTOR MAINTENANCE
1. Remove the engine cover.
See Rocker Arm
Clearance.
2. With a flat blade
screwdriver or Torx T-20
bit and a T-25 bit, remove
the screws attaching the
spark arrestor diverter to
the muffler (Fig. 33).
3. Pull the tab on the spark
arrestor cover out of the
muffler. Remove the spark arrestor cover.
4. Remove the spark arrestor screen from the spark arrestor
cover.
5. Clean the spark arrestor screen with a wire brush or replace it.
6. Reinstall the spark arrestor screen, spark arrestor cover and
screw.
3. If the cutting attachment rotates when the engine idles, turn the
idle speed screw counterclockwise 1/8 of a turn at a time (as
needed), to reduce idle speed.
Checking the fuel, cleaning the air filter, and adjusting the idle speed
should solve most engine problems. If not and all of the following
are true:
• the engine will not idle
• the engine hesitates or stalls on acceleration
• there is a loss of engine power
Have the carburetor adjusted by an authorized service dealer.
ROCKER ARM CLEARANCE
This requires disassembly of the engine. If you feel unsure or
unqualified to perform this, take the unit to a Sears or other qualified
service center.
NOTE: Inspect the valve to rocker arm clearance with a feeler
gauge after the first 25 hours of operation and then every
25 hours of operation thereafter.
• The engine must be cold when checking or adjusting the valve
clearance.
• This task should be performed inside in a clean, dust free area.
1. Remove the two (2) screws on back of the engine cover and the
one on the front of the engine cover with a Flat-head or T-25
Torx screwdriver (Fig. 27).
2. Remove the engine cover
(Fig. 28).
3. Disconnect the spark plug
wire.
4. Clean dirt from around the
spark plug. Remove the
spark plug from the
cylinder head by turning a
5/8 in. socket
counterclockwise.
5. Clean dirt from around the
rocker arm cover. Remove
the screw holding the
rocker arm cover with a
large flat blade
screwdriver or Torx T-25
bit (Fig. 29). Remove the
rocker arm cover and
gasket.
6. Pull the starter rope
slowly to bring the piston
to the top of its travel,
(known as top dead
center). Check that:
•
The piston is at the top of its
travel. This should be done
by looking into the spark
plug hole. (Fig. 29)
• Both rocker arms move
freely, and both valves are
closed
If these statements are
not true, repeat step 6.
7. Slide the feeler gauge
between the rocker arm
and the top of each valve
stem. Measure the
clearance between the valve stem and rocker arm (Fig. 31).
Measure both the intake and exhaust valves.
The recommended clearance for both intake and exhaust is .003 – .006 in.
(.076 – 0.152 mm). Use a standard automotive .005 in. (0.127 mm) feeler
gauge. The feeler gauge should slide between the rocker arm and valve
stem with a slight amount of resistance, without binding. Figure 30 and 31
show how to measure the clearance.
0.025 in.
(0.635 mm)
Fig. 32
WARNING:
Do not sand blast, scrape or clean spark plug
electrodes. Grit in the engine could damage the cylinder.
WARNING:
To avoid serious personal injury, always turn your
trimmer off and allow it to cool before you clean or maintain it.
9
Fig. 27
Fig. 28
MAINTENANCE & REPAIR INSTRUCTIONS
Fig. 29
Fig. 30
Fig. 31
Remove Screws
Engine
Cover
Muffler
Screw
Rocker Arm
Cover
Spark
Plug Hole
Adjusting Nuts
Rocker
Arms
INTAKE
EXHAUST
Rocker Arm
Feeler
Gauge
Valve Stem
Exhaust
Adjusting
Nut
0.003–0.006 in.
(0.076–0.152 mm)
T-20 Screw
Fig. 33
T-25
Screw
Diverter
Spark Arrestor
Screen
Muffler
Slot
Empty fuel tank Fill fuel tank with fuel
Primer bulb wasn't pressed enough Press primer bulb fully and slowly 10 times
Old fuel Drain gas tank and add fresh fuel
Fouled spark plug Replace or clean the spark plug
Plugged spark arrestor Clean or replace spark arrestor
Air filter is plugged Replace or clean the air filter
Old fuel Drain gas tank and add fresh fuel
Improper idle speed Adjust according to the Idle Speed Adjustments section.
Old fuel Drain gas tank and add fresh fuel
Improper carburetor adjustment Take to Sears or an authorized service dealer for an adjustment
Cutting attachment bound with grass Stop the engine and clean the cutting attachment
Dirty air filter Clean or replace the air filter
Plugged spark arrestor Clean or replace spark arrestor
Old fuel Drain gas tank and add fresh fuel
Improper carburetor adjustment Take to Sears or an authorized service dealer for an adjustment
Fouled spark plug Replace or clean the spark plug
Plugged spark arrestor Clean or replace spark arrestor
CLEANING
Use a small brush to clean off the outside of the unit. Do not use
strong detergents. Household cleaners that contain aromatic oils
such as pine and lemon, and solvents such as kerosene, can damage
plastic housing or handle. Wipe off any moisture with a soft cloth.
STORAGE
• Never store the unit with fuel in the tank where fumes may reach
an open flame or spark.
• Allow the engine to cool before storing.
• Lock up the unit to prevent unauthorized use or damage.
• Store the unit in a dry, well-ventilated area.
• Store the unit out of the reach of children.
LONG TERM STORAGE
1. Drain all gasoline from the gas tank into a container. Do not use gas
that has been stored for more than 60 days. Dispose of the old
gasoline in accordance to Federal, State, and Local regulations.
10
TROUBLESHOOTING
PROBLEM SOLUTION
MAINTENANCE & REPAIR INSTRUCTIONS
WARNING:
To avoid serious personal injury, always
turn the unit off and allow it to cool before you clean or
service it.
2. Start the engine and allow it to run until it stalls. This ensures
that all gasoline has been drained from the carburetor.
3. Allow the engine to cool. Remove the spark plug and put 5
drops of high quality motor oil into the cylinder. Pull the starter
rope slowly to distribute the oil. Reinstall the spark plug.
NOTE: Remove the spark plug and drain all of the oil from the
cylinder before attempting to start the trimmer after
storage.
4. Change the oil, referring to Changing the Oil. Dispose of the old
oil in accordance to Federal, State and Local regulations.
5. Thoroughly clean the unit and inspect for any loose or damaged
parts. Repair or replace damaged parts and tighten loose
screws, nuts or bolts. The unit is ready for storage.
TRANSPORTING
• Allow the engine to cool before transporting.
• Secure the unit while transporting.
• Drain the gas tank before transporting.
• Tighten gas cap before transporting.
ENGINE WILL NOT START
ENGINE WILL NOT IDLE
ENGINE WILL NOT ACCELERATE
ENGINE LACKS POWER OR STALLS WHEN CUTTING
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