Operator’s Manual
LT31CS
2-Cycle Petrol
Trimmer/Brushcutter
IMPORTANT: Read safety rules and instructions carefully before operating equipment.
MTD SOUTHWEST 550 N. 54TH STREET, CHANDLER, ARIZONA 85226-2434
PRINTED IN U.S.A.
PART NO. 769-00304
(8/02)
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SECTION 1: IMPORTANT SAFE OPERATION PRACTICES
This Symbol Points Out Important Safety Information Which, If Not Followed, Could Endanger The Personal
Safety And/or Property Of Yourself And Others. Read And Follow All Instructions In This Manual Before
Attempting To Operate Your Cultivator. Failure To Comply With These Instructions May Result In Personal
Injury. When You See This Symbol–Heed Its Warning.
SAFETY ALERT SYMBOL: 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: 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.
•
Squeeze the throttle control and check that it returns
automatically to the idle position. Make all adjustments
or repairs before using unit.
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.
Inspect the unit before use. Replace damaged parts.
Check for fuel leaks. Make sure all fasteners are in
place and secure. Replace cutting head parts that are
cracked, chipped, or damaged in any way. Make sure
the cutting head is properly installed and securely
fastened. Be sure the cutting head guard is properly
attached, and positioned as recommended. Failure to
do so can result in personal injury to the operator and
bystanders, as well as damage to the unit.
Use only 2.41 mm (0.095 inch) diameter original
equipment replacement line. Never use metal-
reinforced line, wire, or rope, etc. These can break
off and become a dangerous projectile.
SAFETY WARNINGS FOR PETROL TRIMMERS
WARNING: Petrol (gasoline) is highly flammable,
and its vapors can explode if ignited. Take the
following precautions:
•
•
Store fuel only in containers specifically designed
and approved for the storage of such materials.
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 area outdoors where there
are no sparks or flames. Slowly remove the fuel cap only
after stopping engine. Do not smoke while fueling or mixing
fuel. Wipe up any spilled fuel from the unit immediately.
•
•
•
Avoid creating a source of ignition for spilled fuel.
Do not start the engine until fuel vapors dissipate.
Move the unit at least 9.1 m (30 feet) from the fueling
source and site before starting the engine. Do not
smoke, keep sparks and open flames from the area
while adding fuel or operating the unit.
•
•
Be aware of risk of injury to head, hands, and feet.
Clear the area to be cut before each use. Remove
all objects such as rocks, broken glass, nails, wire,
or string which can be thrown or become entangled
in the cutting head.
WHILE OPERATING
•
•
Clear the area of children, bystanders, and pets. At
a minimum, keep all children, bystanders and pets
outside a 15 meters (50 ft.) 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 engine
and cutting head immediately.
•
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 area outdoors.
•
Wear safety glasses or goggles and ear/hearing protection
when operating this unit. Wear a face or dust mask if the
operation is dusty. Long sleeve shirts are recommended.
3
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•
•
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 guard must always be in place while operating
the unit as a trimmer. 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 guard.
This unit has a clutch. The cutting head remains
stationary when the engine is idling. If it does not, have
the unit adjusted by an authorized service technician.
•
•
•
•
Always use the shoulder harness when using the
brush blade accessory.
Keep the handle between the operator and cutting
head or cutting blade at all times.
NEVER cut with the cutting blade located over 76
cm (30 in.) or more above the ground level.
Kick back may occur when the spinning brush blade
contacts an object that it does not immediately cut. Kick
back can be violent enough to cause the unit and/or
operator to be propelled in any direction, and possibly lose
control of the unit. Kick back can occur without warning if
the blade snags, stalls or binds. This is more likely to occur
in areas where it is difficult to see the material being cut.
•
•
•
Adjust the J-Handle to your size to provide the best grip.
Be sure the cutting head is not in contact with
anything before starting the unit.
•
For operation with the cutting blade, do not cut
anything thicker than 12.7mm (1/2-in.) or a violent
kick back could occur.
•
Before each use, check that the cutting head is in good
condition and correctly installed, that the trigger returns
automatically to the idle position.
•
•
Do not attempt to touch or stop the cutting blade
when it is rotating.
A coasting cutting blade can cause injury while it
continues to spin after the engine is stopped or the
throttle trigger is released. Maintain proper control
until the blade has completely stopped rotating.
•
•
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 the tool for the purpose
intended.
•
•
•
Do not run unit at high speed when not cutting.
I
f you strike or become entangled with a foreign object,
•
•
Do not overreach. Always keep proper footing and balance.
stop the engine immediately and check for damage. Have
any damage repaired before attempting further operations.
Do not operate with a bent, cracked, or dull cutting blade.
Discard blades that are bent, warped, cracked, or broken.
Always hold the unit with both hands when
operating. Keep a firm grip on both the front and
rear handles or grips.
•
•
Always use the shoulder harness when using this unit.
•
•
Do not sharpen the cutting blade. Sharpening the
blade can cause the blade tip to break off while in
use. This can result in severe personal injury.
Replace the cutting blade.
Stop the engine IMMEDIATELY if you feel excessive
vibration. Vibration is a sign of trouble. Inspect thoroughly
for loose nuts, bolts, or damage before continuing. Repair
or replace affected parts as necessary.
Keep hands, face, and feet at a distance from all
moving parts. Do not touch or try to stop the cutting
head when it is rotating.
Do not touch the engine or muffler. These parts get
extremely hot from operation. When turned off they
remain hot for a short time.
Do not operate the engine faster than the speed
needed to cut, trim or edge. Do not run the engine
at high speed when not cutting.
Always stop the engine when cutting is delayed or
when walking from one cutting location to another.
•
•
AFTER USE
•
Clean cutting blades with a household cleaner to remove
any gum build-up. Oil the blade with machine oil to
prevent rust.
Lock up and store the cutting blade in an appropriate area
to protect the blade from unauthorized use or damage.
•
•
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.
•
OTHER SAFETY WARNINGS
•
•
Stop and switch the engine off for maintenance, repair
or for changing the cutting head and cutting blade.
Use only original equipment replacement parts when servicing
this unit. These parts are available from your authorized
service dealer. Do not use parts, accessories, or attachments
not authorized for this unit. Doing so 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 head and guard.
To reduce fire hazard, replace faulty mufflers and
spark arrestors, keep the engine and muffler free of
grass, leaves, excessive grease, or carbon build-up.
•
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. Drain fuel
before transporting unit.
Store the unit in a locked up and dry, or high and
dry place to prevent unauthorized use or damage.
Keep 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 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.
WHILE OPERATING WITH CUTTING BLADE
•
Read and understand all safety warnings before
operating this unit.
SAVE THESE INSTRUCTIONS
4
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SAFETY AND INTERNATIONAL SYMBOLS
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.
SYMBOL
MEANING
SYMBOL
MEANING
• WEAR HEAD PROTECTION
• SAFETY ALERT SYMBOL
WARNING: Falling objects can
Indicates danger, warning, or
cause severe head injury. Wear head
protection when operating this unit.
caution. May be used in conjunction
with other symbols or pictographs.
• ON/OFF STOP CONTROL
• WARNING - READ
OPERATOR'S MANUAL
ON / START / RUN
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.
• ON/OFF STOP CONTROL
OFF or STOP
• WEAR EYE AND HEARING
PROTECTION
• HOT SURFACE WARNING
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.
Do not touch a hot muffler or cylinder.
You may get burned. These parts get
extremely hot from operation. They
remain hot for a short time even after
the unit is turned off.
• SHARP BLADE
• KEEP BYSTANDERS AWAY
WARNING: Sharp blade on cutting
head guard. To prevent serious injury,
do not touch line cutting blade.
WARNING: Keep all bystanders,
especially children and pets, at least
50 feet (15 m) from the operating area.
• PRIMER
• BRUSHCUTTERS Replace
dull blade
Push primer bulb, fully and slowly, 5
to 7 times.
Do not sharpen the cutting blade.
Sharpening the blade can cause the
blade tip to break off while in use. This
can result in severe personal injury.
• UNLEADED FUEL
Always use clean, fresh unleaded fuel.
• CHOKE CONTROL
A. FULL choke position.
B. PARTIAL choke position.
C. RUN position.
• OIL
Refer to operator's manual for the
proper type of oil.
• TRIMMER/BRUSHCUTTER
SAFETY
WARNING: Thrown objects and
rotating cutter can cause severe injury.
Keep bystanders, especially children
and pets, at least 15 meters (50 ft.)
away from the cutting area. The
cutting head guard must be used
when using the trimmer cutting head.
• THROWN OBJECTS CAN
CAUSE SEVERE INJURY
WARNING: Keep clear of blower
outlet. Never point the blower at
yourself or others. Objects can be
thrown from blower. Do not operate
unit without proper attachments and
guards in place.
5
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SECTION 2: KNOW YOUR TRIMMER
KNOW YOUR UNIT
APPLICATIONS
As a trimmer:
As a brushcutter:
•
Cutting weeds and light brush of up to 12.7mm
(1/2-in.) in diameter
•
•
•
Cutting grass and light weeds
Edging
Decorative trimming around trees, fences, etc.
Fuel Cap
Starter Rope Grip
Choke
Lever
Shaft Grip
Primer
Bulb
Support
Fitting
Throttle
Control
Throttle Lock-Out
J-Handle
Muffler
Spark Plug
Air Filter/Muffler
Cover
Blade Shield /
Guard Mount
On/Off
Stop
Control
Shaft
Housing
Throttle Control
Cutting Blade
Gear Housing
Cutting Head Guard
Line Cutting Blade
Cutting Head
6
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SECTION 3: ASSEMBLING YOUR TRIMMER
On some units, the J-handle may be pre-installed, requiring
only screw loosening and J-handle adjustment tailored to the
operator. Go to step 6 to adjust the J-handle if it is pre-installed.
Adjusting
6. Loosen the screws so that the J-handle can be
easily moved in the clamp assembly. Do not remove
the screws or nuts.
INSTALLING AND ADJUSTING THE J-HANDLE
Installing
1. Remove the screws, nuts, and top and middle clamp
pieces that were installed on the J-handle for
shipping.
7. Slide the J-handle in or out until the arrow/white line on
the decal touches the clamp assembly, Figure 2.
2. Place the J-handle between the top and middle
clamp pieces, Figure 1.
J-Handle
(4) Screws
Decal
FIGURE 2
Top Clamp
8. While holding the unit in the operating position,
position the J-handle to the location that provides
you the best grip, Figure 3.
Middle Clamp
9. Tighten the clamp screws evenly, until the J-handle
is secure.
Bottom Clamp
Nuts
FIGURE 1
3. While holding the three pieces together, install the four (4)
screws through the top clamp and into middle clamp.
NOTE: The holes in the top and middle clamp will line
up only when assembled correctly.
4. Place the clamps and the J-handle over the shaft
housing and onto the bottom clamp.
5. Hold each hex nut in the bottom clamp recess with a
finger. Start screws with a large Phillips screwdriver.
Do not tighten until you make the handle adjustment.
FIGURE 3
7
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INSTALLING THE HARNESS
REMOVING AND INSTALLING CUTTING
HEAD GUARD
WARNING: Always use the shoulder harness
when using the cutting blade to avoid serious
personal injury.
NOTE: Remove the cutting head guard when using the
unit as a brushcutter.
1. Push the strap through the centre of the buckle.
WARNING: The cutting head guard should
NOT be installed when operating the unit with
a blade. Remove the cutting head guard
before removing or installing the blade.
2. Pull the strap over the cross bar and down through
the slot in the buckle, Figure 4.
3. Put the harness on overhead and onto shoulder.
Snap it on to the support fitting, Figure 5.
Remove the cutting head guard from the guard mount
by removing the three (3) screws with a flat blade
screwdriver, Figure 7. Store parts for future use.
4. Adjust length to fit the operator’s size. Pull tab to
lengthen, pull strap to shorten, Figure 6.
NOTE: Install the cutting head guard when using the
unit as a grass trimmer.
WARNING: To avoid serious personal injury,
the cutting head guard SHALL be in place at
all times while operating the unit as a grass
trimmer.
Install the cutting head guard on the guard mount by
inserting the three (3) screws into the guard mount. Tighten
securely with a flat blade screwdriver, Figure 7.
FIGURE 4
(3) Screws
Cutting
Head Guard
Support Fitting
Gear Housing
Guard Mount
FIGURE 5
FIGURE 7
REMOVING THE CUTTING HEAD AND
INSTALLING THE CUTTING BLADE
NOTE: To make removing or installing the cutting blade
or cutting head easier, place the unit on the
ground or on a work bench.
Remove the Cutting Head Guard
See Removing and Installing Cutting Head Guard
instructions above.
FIGURE 6
8
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Remove the Cutting Head
Cutting Head
WARNING: The gear housing gets hot with use
and can result in injury to the operator. When the
unit is turned off it remains hot for a short time.
Do not touch the gear housing until it has cooled.
1. Align the shaft bushing hole with the locking rod slot
and insert the locking rod into the shaft bushing
hole, Figure 8.
Locking
Rod Slot
Shaft Bushing Hole
Output
Shaft
Locking Rod
FIGURE 10
4. Place the cutting blade on the output shaft bushing,
Figure 11.
Locking Rod Slot
5. Make sure that the cutting blade is centered on the
pilot step and sitting flat against the output shaft
bushing, Figure 12.
Output Shaft
Bushing
Locking Rod
WARNING: If the cutting blade is off-centre,
the unit will vibrate, and the blade may fly off,
which can cause serious personal injury.
FIGURE 8
2. Hold the locking rod in place by grasping it next to
the boom of the unit, Figure 9.
Blade Retainer
Nut
Cutting
Blade
Guard
Mount
Pilot Hole
Output Shaft
Bushing
FIGURE 9
3. While holding the locking rod, remove the cutting
head by turning it clockwise off of the output shaft,
Figure 10. Store the cutting head for future use.
Locking Rod
FIGURE 11
NOTE: The blade retainer under the cutting head will
be used when installing the cutting blade.
Pilot Step
Install the Cutting Blade
WARNING: To avoid serious personal injury,
always wear gloves while handling or installing
the blade.
FIGURE 12
9
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6. Align the shaft bushing hole with the locking rod
slot and insert the locking rod into the bushing hole,
Figure 8.
2. Hold the locking rod in place by grasping it next to
the boom of the unit, Figure 14.
3. While holding the locking rod, loosen the nut on
the blade by turning it clockwise with a 5/8 inch
closed-end or socket wrench, Figure 14.
7. Put the blade retainer and nut on the output shaft.
Make sure that the blade is installed correctly.
8. Tighten nut counterclockwise against the blade while
holding the locking rod:
•
If using a torque wrench and an 5/8 inch socket
tighten to:
37 - 38 N•m; 325 - 335 in•lb; 27 - 28 ft.•lb.
•
Without a torque wrench, use a 5/8 inch closed-end or
socket wrench, turning the nut until the blade retainer is
snug against the shaft bushing. Make sure that the blade
is installed correctly, then rotate the nut an additional 1/4
to 1/2 turn counterclockwise, Figure 13.
Clockwise
FIGURE 14
4. Remove the nut, blade retainer, and blade. Store the
nut and blade together for future use in a secure
place. Store out of reach of children.
Install the Cutting Head
5. Align the shaft bushing hole with the locking rod slot and
insert the locking rod into the shaft bushing hole,
Figure 8. Place the blade retainer on the output shaft with
the flat surface against the output shaft bushing as
shown in Figure 15. Screw the cutting head
1/4-1/2 turn
Counterclockwise
counterclockwise onto the output shaft. Tighten securely.
FIGURE 13
9. Remove the locking rod from the locking rod slot.
Cutting Head
WARNING: To avoid serious personal injury or
damage to the unit, do not start or operate this
unit with the locking rod in the locking rod slot.
Blade Retainer
WARNING: Do not sharpen the cutting blade.
Sharpening the blade can cause the blade tip
to break off while in use. This can result in
severe personal injury. Replace the blade.
Output Shaft Bushing
REMOVING THE CUTTING BLADE AND
INSTALLING THE CUTTING HEAD
Remove the Cutting Blade
Locking Rod
FIGURE 15
NOTE: The blade retainer must be installed on the
output shaft in the position shown for the
cutting head to work correctly.
WARNING: To avoid serious personal injury,
always wear gloves while handling or installing
the blade.
6. Remove the locking rod.
7. Install the cutting head guard. See Removing and
1. Align the shaft bushing hole with the locking rod
slot and insert the locking rod into the bushing hole,
Figure 8.
Installing Cutting Head Guard instructions.
WARNING: To avoid serious personal injury,
the cutting head guard MUST be in place at all
times while operating the unit as a grass
trimmer.
10
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SECTION 4: OPERATING YOUR TRIMMER
RECOMMENDED OIL TYPE
Use a high quality oil formulated for use in 2-cycle,
air-cooled engines.
Old and/or improperly mixed fuel are usually the main
reasons for the unit not running properly. Be sure to use
fresh, clean fuel and follow the instructions carefully for
the proper fuel/oil mixture.
RECOMMENDED FUEL TYPE
NOTE: Alcohol-blended fuel absorbs moisture (water).
As little as 1% moisture in the fuel can cause
fuel and oil to separate and form acids when
stored. If alcohol - blended fuel must be used,
use fresh fuel (less than 60 days old), and mix
according to the mixing instructions.
Always use clean, fresh, unleaded petrol (gasoline) that
is less than 60 days old.
WARNING: Petrol (gasoline) is extremely
flammable and its vapors can explode if they
are ignited. 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 away from the area.
DEFINITION OF BLENDED FUELS
Today's fuels are often a blend of petrol (gasoline) and
one or more oxygenates such as ethanol, methanol or
MTBE (ether).
WARNING: Remove fuel cap slowly to avoid
injury from fuel spray.
USE OF BLENDED FUELS
If you choose to use a blended fuel or its use is
unavoidable, the following precautions are
recommended:
1. Always use the fresh fuel mix explained in your
operator's manual.
DANGER: Combustible mixture contains
petroleum distillate. Store away from heat or
open flame. Harmful or fatal if swallowed. If
swallowed, do not induce vomiting, call a
physician immediately. Avoid prolong contact
with skin. Wash thoroughly after handling.
2. Use the fuel additive STA-BIL® or an equivalent.
3. Always agitate the fuel mix before fueling the unit.
4. Drain the tank and run the engine dry before storing
the unit.
OIL AND FUEL MIXING INSTRUCTIONS
USE OF FUEL ADDITIVES
Thoroughly mix 3.8 liters of unleaded petrol (gasoline)
with 120 ml. of 2 cycle engine oil in a separate fuel can,
32:1. Do not mix them directly in the engine fuel tank.
The use of fuel additive, such as STA-BIL® Fuel
Stabilizer or an equivalent, will inhibit corrosion and
minimize the formation of gum deposits. Add 23 ml. (0.8
oz.) per gallon of fuel per instructions on container.
NEVER add fuel additives directly to the unit's fuel tank.
Using a fuel additive can keep fuel fresh for up to six (6)
months.
+
CAUTION: For proper engine operation and
maximum reliability, pay strict attention to the
oil and fuel mixing instructions on the
UNLEADED GAS
2 CYCLE OIL
2-cycle oil container. Use a 25:1 fuel/oil ratio.
Use 2-cycle oil. Using improperly mixed fuel
can severely damage the engine.
4.8 LITERS
(1.27 US. GALLON)
+
120 ml
(4.0 FL. OZ.)
1 LITER + 25 ml
MIXING RATIO - 32:1
11
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Stop/Off (O)
STARTING INSTRUCTIONS
On/Off Stop Control
Start/On (I)
WARNING: Operate this unit only in a well
ventilated outdoor area. Carbon monoxide
exhaust fumes can be lethal in a confined
area.
Throttle
Lock-Out
WARNING: Avoid accidental starting. Be in the
starting position when pulling the starter rope,
Figure 18. The operator and unit must be in a
stable position while starting to avoid serious
personal injury.
Throttle Control
FIGURE 16
1. Mix petrol (gasoline) with oil. Fill fuel tank with
fuel/oil mixture. See Oil and Fuel Mixing Instructions.
2. Put the ignition switch in the ON (I) position,
Full Choke Position (A)
Partial Choke Position (B)
Figure 16.
3. Fully press and release the primer bulb 5 to7 times,
slowly, until FUEL IS VISIBLE IN THE PRIMER
BULB, Figure 17. If you can’t see fuel in the bulb,
press and release the bulb three (3) additional times,
or as many times as it takes before you can see fuel
in it.
Run
Position (C)
4. Place the choke lever in the FULL choke (A)
Choke Lever
Primer Bulb
position, Figure 17.
5. With the unit in the starting position, squeeze and
hold the throttle control to the wide open (full
throttle) position and pull the starter rope briskly 5
times in the FULL choke (A)
position, Figure 18.
If the engine attempts to run before the fifth pull,
proceed to step 6.
NOTE: The engine will not run in the FULL choke (A)
position.
FIGURE 17
6. Place the choke lever in the PARTIAL choke (B)
position, Figure 17.
7. Pull starter rope briskly 1 to 3 times to start the
engine, Figure 18.
NOTE: Squeeze and hold the throttle control until the
Starter Rope
engine has started and warmed up.
8. If the engine does not start, repeat steps 4 through 7.
NOTE: If the engine floods while trying to start, place
the choke lever in the RUN (C)
position,
Figure 6. Squeeze the throttle control. Pull the
starter rope briskly. The engine should start
within three (3) to eight (8) pulls.
9. Squeeze the throttle control to warm up engine for 5
to 10 seconds. Place the choke lever in the RUN (C)
position, Figure 17.
Throttle Control
FIGURE 18
STOPPING INSTRUCTIONS
1. Release your hand from the throttle control,
Figure 18. Allow the engine to cool down by idling.
NOTE: Choking is unnecessary when starting a warm
engine. Put the ignition switch in the ON
position (Figure 16), and start in PARTIAL
choke (B)
position (Figure 17).
2. Put the ignition switch in the OFF (O) position,
Figure 16.
12
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HOLDING THE TRIMMER
For best results, tap the Bump Head™ on bare ground
or hard soil. If line release is attempted in tall grass, the
engine may stall. Always keep the trimming line fully
extended. Line release becomes more difficult as the
cutting line becomes shorter.
WARNING: Always wear eye, hearing, foot
and body protection to reduce the risk of injury
when operating this unit.
NOTE: Do not rest the Bump Head™ on the ground
Before operating the unit, stand in the operating position,
Figure 19. Check for the following:
while the unit is running.
•
•
•
The operator is wearing eye protection and proper
clothing
CAUTION: Do not remove or alter the line
cutting blade assembly. Excessive line length
will make the unit overheat. This may lead to
serious personal injury or damage to the unit.
With a slightly-bent right arm, the operator’s hand is
holding the shaft grip
The operator’s left arm is straight, his hand holding
the J-handle
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
•
•
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
TIPS FOR BEST TRIMMING RESULTS
•
•
Keep the cutting head parallel to the ground.
Do not force the cutting head. 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 200 mm (8 inches) by working from
top to bottom in small increments to avoid
premature line wear or engine drag.
Cut from left to right whenever possible. Cutting to
the right improves the unit's cutting efficiency.
Clippings are thrown away from the operator.
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.
FIGURE 19
ADJUSTING TRIMMING LINE LENGTH
•
•
Trim only when grass and weeds are dry.
The life of your cutting line is dependent upon:
The Bump Head™ cutting head allows you to release
trimming line without stopping the engine. To release
more line, lightly tap the cutting head on the ground
while operating the trimmer at high speed, Figure 20.
•
•
•
Following the previous trimming techniques
What vegetation is being cut
Where it’s being cut
NOTE: Always keep the trimming line fully extended.
Line release becomes more difficult as cutting
line becomes shorter.
FIGURE 21
For example, the line will wear faster when trimming against
a foundation wall as opposed to trimming around a tree.
FIGURE 20
Each time the head is bumped, about 25.4 mm (1 inch) of
trimming line releases. A blade in the cutting head guard will
cut the line to the proper length if excess line is released.
DECORATIVE TRIMMING
Decorative trimming is accomplished by removing all
vegetation around trees, posts, fences, etc.
Rotate the whole unit so that the cutting head is at a
30° angle to the ground, Figure 10.
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USING THE CUTTING BLADE
WARNING: The blade continues to spin after
the engine is turned off. The coasting blade
can seriously cut you if accidentally touched.
WARNING: Always wear eye, hearing, foot,
body protection and the strap to reduce the
risk of injury when operating this unit.
•
•
•
Swing the unit in the same direction as the blade
spins, which increases the cutting action.
Move forward to the next area to be cut after the
return swing and plant feet again.
The cutting blade is designed with a second cutting
edge, which can be used by removing the blade,
turning it upside down, and reinstalling it.
WARNING: Do not use the cutting blade for
edging or as an edger, severe personal injury
to yourself or others can occur.
Before operating the unit with the cutting blade stand in
the operating position, Figure 22. Refer to Holding the
Trimmer.
WARNING: Do not sharpen the cutting blade.
Sharpening the blade can cause the blade tip
to break off while in use. This can result in
severe personal injury to yourself or others.
Replace the blade.
Cutting Blade Operating Tips:
To establish a rhythmic cutting procedure:
•
•
Plant feet firmly, comfortably apart.
Bring the engine to full throttle before entering the
material to be cut. The blade has maximum cutting
power at full throttle and is less likely to bind, stall,
or cause blade thrust, which can result in serious
personal injury to the operator or others.
To reduce the chance of material wrapping
around the blade, follow these steps:
•
•
Cut at full throttle.
Swing the unit into material to be cut from your right
to your left, Figure 23.
•
Avoid the material just cut as you make the return
swing.
FIGURE 23
WARNING: Do not clear away cut material
with the engine running or blade turning. To
avoid serious personal injury, turn off engine.
Allow the blade to stop before removing
materials wrapped around the blade shaft.
FIGURE 22
WARNING: Kick back may occur when the
spinning blade contacts an object that it does
not immediately cut. Kick back can be violent
enough to cause the unit and/or operator to be
propelled in any direction, and possibly lose
control of the unit. Kick back can occur without
warning if the blade snags, stalls, or binds.
This is more likely to occur in areas where it is
difficult to see the material being cut.
•
•
•
Cut while swinging the upper part of your body from
right to left.
Always release the throttle trigger and allow the
engine to return to idle speed when not cutting.
When done always unsnap unit from harness before
taking harness off.
14
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SECTION 5: MAINTAINING YOUR TRIMMER
NOTE: Some maintenance procedures may require
special tools or skills. If you are unsure about
these procedures take your unit to an
authorized service dealer.
NOTE: Emission control device and system repair,
maintenance or replacement may be performed
by any non-road engine repair establishment,
individual or authorized service dealer.
In order to assure peak performance of your engine,
inspection of the engine exhaust port may be necessary
after 50 hours of operation. If you notice lost RPM, poor
performance or general lack of acceleration, this service
may be required. If you feel your engine is need of this
inspection, refer service to an authorized servicing dealer, or
establishment for repair. DO NOT attempt to perform this
process yourself as engine damage may result from
contaminants involved in the cleaning process for the port.
MAINTENANCE SCHEDULE
These required maintenance procedures should be
performed at the frequency stated in the table. They
should also be included as part of any seasonal tune-up.
WARNING: To prevent serious injury, perform
maintenance or repairs on a cool unit, never
with the unit running. Disconnect spark plug
wire to ensure the unit will not start.
FREQUENCY
MAINTENANCE REQUIRED
REFER TO
Before Starting Engine
Fill fuel tank with correct oil and fuel mixture
Page 11
Every 10 Hours
Clean and re-oil air filter
Page 17
Check and clean spark arrestor
Check spark plug condition and gap
Page 19
Page 18
Every 25 Hours
Inspect exhaust port and spark arrestor screen for clogging
or obstruction to assure maximum performance levels
Page 19
Every 50 Hours
LINE INSTALLATION
3. Remove spring from the inner reel, Figure 24.
This section covers both SplitLine™ and standard single
line installation.
4. Use a clean cloth to wipe the the inner reel, spring,
shaft and inner surface of the outer spool, Figure 25.
Always use genuine 0.095 in. (2.41 mm) replacement
line. Line other than specified may make the engine
overheat or fail.
5. Check the indexing teeth on the inner reel and outer
spool for wear, Figure 26. If necessary, remove burrs
or replace the reel and spool.
WARNING: Never use metal-reinforced line,
wire, chain, or rope. These can break off and
become dangerous projectiles.
There are two methods to replace the trimming line:
• Wind the inner reel with new line
• Install a prewound inner reel
Winding the Existing Inner Reel
FIGURE 25
1. Hold the outer spool with one hand and unscrew the
Bump Knob clockwise, Figure 24 . Inspect the bolt
inside the bump knob to make sure it moves freely.
Replace the bump knob if damaged.
Indexing Teeth
2. Remove the inner reel from the outer spool, Figure 24.
Outer Spool
Spring
FIGURE 26
Inner Reel
Bolt
Bump Knob
FIGURE 24
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NOTE: SplitLine™ can only be used with the inner reel
containing the slotted holes. Single line can be
used on either type of inner reel. Use Figure 27
to identify the inner reel you have.
9. Insert the end of the line into the open hole in the
inner reel and pull the line tight to make the loop as
small as possible, Figure 30.
10. Before winding, split the line back about 6 inches.
11. Wind the line in tight even layers in the direction
indicated on the inner reel.
NOTE: Always use the correct line length when installing
trimming line on the unit. The line may not
release properly if the line is too long.
For Use with
Single Line ONLY
For Use with SplitLine™
or Single Line
Slotted
Holes
Loop
FIGURE 30
NOTE: Failure to wind the line in the direction indicated
will cause the cutting attachment to operate
incorrectly.
FIGURE 27
Single Line Installation
Go To Step 8 for SplitLine™ Installation
12. Insert the ends of the line into the two holding slots,
Figure 31.
6. Take approximately 30 feet (9.14 m) of new trimming
line, loop it into two equal lengths. Insert each end of
the line through one of the two holes in the inner
reel, Figure 28. Pull the line through the inner reel so
that the loop is as small as possible.
13. Insert the ends of the line through the eyelets in the
outer spool and place inner reel with spring inside
the outer spool, Figure 32. Push the inner reel and
outer spool together. While holding the inner reel and
outer spool, grasp the ends and pull firmly to release
the line from the holding slots in the reel.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting attachment.
14. Hold the inner reel in place and install the bump
knob by turning counterclockwise. Tighten securely.
Loop
FIGURE 28
7. Wind the lines in tight even layers, onto the reel,
Figure 29. Wind the line in the direction indicated on
the inner reel. Place your index finger between the
two lines to stop the lines from overlapping. Do not
overlap the ends of the line. Proceed to step 11.
Holding Slots
FIGURE 31
FIGURE 29
SplitLine™ Installation
8. Take approximately 15 feet (4.57 m) of new trimming
line. Insert one end of the line through one of the two
holes in the inner reel, Figure 30. Pull the line through
the inner reel until only about 4 inches are left out.
Spring
FIGURE 32
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Clean and re-oil the air filter every 10 hours of operation.
It is an important item to maintain. Failure to maintain
the air filter will VOID the warranty.
INSTALLING A PREWOUND REEL
1. Hold the outer spool with one hand and unscrew the
bump knob clockwise, Figure 15. Inspect the bolt
inside the bump knob to make sure it moves freely.
Replace the bump knob if damaged.
1. Remove air filter/muffler cover. See Removing the
Air filter/Muffler Cover.
2. Remove the old inner reel from the outer spool, Figure 24.
3. Remove the spring from the old inner reel.
4. Place the spring in the new inner reel.
2. Remove the air filter from behind the air filter/muffler
cover, Figure 34.
3. Wash the filter in detergent and water, Figure 35.
Rinse the filter thoroughly. Squeeze out excess
water. Allow it to dry completely.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting attachment.
5. Insert the ends of the line through the eyelets in the
outer spool, Figure 32.
4. Apply enough clean SAE 30 oil to lightly coat the
filter, Figure 36.
6. Place the new inner reel inside the outer spool. Push
the inner reel and outer spool together. While holding
the the reel and spool, grasp the ends and pull firmly
to release the line from the holding slots in the spool.
5. Squeeze the filter to spread and remove excess oil,
Figure 37.
7. Hold the inner reel in place and install the bump
knob by turning counterclockwise. Tighten securely.
AIR FILTER MAINTENANCE
Removing the Air Filter/Muffler Cover
WARNING: To avoid serious personal injury,
always turn the unit off and allow it to cool
before you clean or perform any maintenance
on it.
Air Filter
Inside Muffler
Cover
1. Place the choke lever in the PARTIAL choke
position (B), Figure 33.
FIGURE 34
FIGURE 35
NOTE: The choke lever must be in the PARTIAL
choke position (B) to remove the air
filter/muffler cover, Figure 33.
2. Remove the four (4) screws securing the air
filter/muffler cover, Figure 33. Use a flat blade or
#T20 Torx bit screwdriver.
3. Pull the cover from the engine. Do not force.
Choke Lever
Partial Choke
Position (B)
FIGURE 36
FIGURE 37
6. Replace the air filter in the air filter/muffler cover,
Figure 34.
NOTE: Operating the unit without the air filter and air
filter/muffler cover assembly, will VOID the
warranty.
Screws
Screws
Reinstalling the Air filter/Muffler Cover
1. Place the air filter/muffler cover over the back of the
carburetor and muffler.
NOTE: The choke lever must be in the PARTIAL choke
position (B) to install the air filter/muffler cover,
Figure 21.
FIGURE 33
Cleaning the Air Filter
2. Insert the four (4) screws into the holes in the air
filter/muffler cover and tighten, Figure 33. Use a flat
blade or #T20 Torx bit screwdriver. Do not over-
tighten. Do not force.
WARNING: To avoid serious personal injury,
always turn the unit off and allow it to cool before
you clean or perform any maintenance on it.
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Checking the fuel mixture, cleaning the air filter, and
adjusting the idle speed should solve most engine
problems.
CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable through the
air filter/muffler cover, Figure 38.
If not and:
NOTE: Careless adjustments can seriously damage
your unit. An authorized service dealer should
make carburetor adjustments.
•
•
•
The engine will not idle
The engine hesitates or stalls on acceleration
There is a loss of engine power
Check Fuel Mixture
Have the carburetor adjusted by an authorized service
dealer.
Old and/or improperly mixed fuel is usually the reason
for the unit not running properly. Drain and refill the tank
with fresh, properly mixed fuel prior to making any
adjustments. Refer to Oil and Fuel Information.
WARNING: When the unit is turned off make
sure the cutting head has stopped before the
unit is set down to prevent serious personal
injury.
Idle Speed Screw
REPLACING THE SPARK PLUG
Use a Champion RDJ7Y spark plug (or equivalent). The
correct air gap is 0.5 mm (0.020 in.). Remove the plug
after every 25 hours of operation and check its condition.
1. Stop the engine and allow it to cool. Grasp the plug
wire firmly and pull the cap from the spark plug.
2. Clean dirt from around the spark plug. Remove the
spark plug from the cylinder head by turning a
5/8 in. socket counterclockwise.
NOTE: Replace cracked, fouled or dirty spark plug.
3. Set the air gap at 0.5 mm (0.020 in.) using a feeler
FIGURE 38
gauge, Figure 39.
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
and change the air/fuel mixture. This is often mistaken
for an out-of-adjustment carburetor. Check the condition
of the air filter before adjusting the idle speed screw.
Refer to Air Filter Maintenance.
0.5 mm
(0.020 in.)
Adjusting the Idle Speed
WARNING: The cutting head will spin during
idle speed adjustments. Wear protective
clothing and observe all safety instructions to
prevent serious personal injury.
FIGURE 39
CAUTION: Do not sand blast, scrape, or clean
electrodes. Grit in the engine could damage the
cylinder.
If after checking the fuel mixture and cleaning the
air filter the engine still will not idle, adjust the idle speed
as follows.
1. Start the engine and let it run at a high idle for a
minute to warm up. See Starting/Stopping
Instructions.
4. Install a correctly gapped spark plug in the cylinder
head. Tighten by turning the 5/8 in. socket clockwise
until snug.
If using a torque wrench torque to:
12.3-13.5 N•m (110-120 in.•lb.)
Do not over tighten.
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, Figure 38. Turn the idle speed screw in,
clockwise, 1/8 of a turn at a time (as needed) until
the engine idles smoothly.
3. If the engine appears to be idling too fast, turn the
idle speed screw out, counterclockwise, 1/8 of a
turn at a time (as needed) to reduce idle speed.
NOTE: If a tachometer is available, set idle speed to
RPM specifications in Specifications section.
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Spark
Arrestor
SPARK ARRESTOR MAINTENANCE
1. Remove air filter/muffler cover. Refer to Removing
Flatblade
Screwdriver
the Air Filter/Muffler Cover.
2. Locate muffler front and the two (2) bolts securing it
to the engine, Figure 40. Remove the two (2) bolts
using a flatblade screwdriver or 5/16-inch socket or
nut driver. Pull muffler off of the engine.
3. Turn muffler over to the back side and locate the
exhaust gasket. Remove the muffler exhaust gasket
from the muffler, Figure 40.
Exhaust
Gasket
Spark
Arrestor
Spark Arrestor
Bolts
Muffler - Back Side
FIGURE 41
7. Place the exhaust gasket against the muffler's back
side. Align exhaust gasket bolt holes with the bolt
holes in muffler. While holding the exhaust gasket in
place, insert bolts into muffler's front side, Figure 40.
8. Place muffler (with exhaust gasket in place and bolts
inserted), against the engine, aligning the bolt holes.
Tighten the bolts to secure muffler to the engine.
If using a torque wrench torque to:
80-90 in.•lb. (9-10.2 N•m)
Muffler - Front Side
Muffler - Back Side
WARNING: If muffler is not tightened
securely, it could fall off and cause damage to
the unit and possibly inflict serious personal
injury.
FIGURE 40
NOTE: If exhaust gasket is torn or damaged, replace
with a new gasket before reassembling muffler.
4. Using a small flatblade screwdriver, carefully pry up
the spark arrestor from the recessed hole, Figure 41.
Remove the spark arrestor from the muffler.
9. Reinstall the air filter/muffler cover.
5. Clean the spark arrestor with a wire brush. Replace
if it is damaged or unable to thoroughly clean,
Figure 41.
6. Reinstall the spark arrestor by pressing it into the
recessed hole on muffler's back side. Make sure it
fits tightly against the muffler and does not protrude.
19
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SECTION 6: OFF SEASON STORAGE
CLEANING THE UNIT
LONG TERM STORAGE
If the unit will be stored for an extended time,
WARNING: To avoid serious personal
injury, always turn the unit off and allow it
to cool before you clean or perform any
maintenance on it.
1. Drain all fuel from the fuel tank into a container. Do
not use fuel that has been stored for more than 60
days. Dispose of the old fuel in accordance to local
regulations.
•
•
Use a small brush to clean off the outside of the unit
and to keep the air vents free of obstructions.
Do not use strong detergents or petroleum based
cleaners, such as kerosene. Some household
cleaners contain aromatic oils such as pine and
lemon that can damage the plastic housings or
handles. Wipe off any moisture with a soft cloth.
2. Start the engine and allow it to run until it stalls. This
ensures that all fuel has been drained from the
carburetor.
3. Allow the engine to cool. Remove the spark plug and
put 30 ml. (1 oz.) 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.
STORAGE
•
Store the unit indoors, away from moisture and
harmful substances such as fertilizers and solvents.
4. 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.
•
Never store the unit with petrol (gasoline) in the tank
where fumes may reach an open flame or spark.
•
•
Allow the engine to cool before storing.
Store the unit in a locked up area to prevent
unauthorized use or damage.
TRANSPORTING
•
•
Store the unit in a dry, well ventilated area.
Store the unit out of the reach of children.
•
•
•
•
Allow the engine to cool before transporting.
Secure the unit while transporting.
Drain the fuel tank before transporting.
Tighten fuel cap before transporting.
20
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SECTION 7: TROUBLE SHOOTING GUIDE
ENGINE WILL NOT START
CAUSE
ACTION
Empty fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Fill fuel tank with properly mixed fuel
Primer bulb wasn't pressed enough . . . . . . . . . . . . . . . .Press primer bulb fully and slowly 5-7 times
Engine flooded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Use starting procedure with choke lever in the
RUN position. See page 12.
Old or improperly mixed fuel . . . . . . . . . . . . . . . . . . . . . .Drain gas tank / Add fresh fuel mixture
Fouled spark plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace or clean the spark plug
ENGINE WILL NOT IDLE
CAUSE
ACTION
Air Filter is plugged . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace or clean the air filter
Old or improperly mixed fuel . . . . . . . . . . . . . . . . . . . . . .Drain gas tank / Add fresh fuel mixture
Improper carburetor adjustment . . . . . . . . . . . . . . . . . . .Adjust per instruction on page 18
ENGINE WILL NOT ACCELERATE
CAUSE
ACTION
Old or improperly mixed fuel . . . . . . . . . . . . . . . . . . . . . .Drain gas tank / Add fresh fuel mixture
Improper carburetor adjustment . . . . . . . . . . . . . . . . . . .Take to an authorized service dealer for carburetor adjustment
ENGINE LACKS POWER OR STALLS WHEN UNDER LOAD
CAUSE
ACTION
Old or improperly mixed fuel . . . . . . . . . . . . . . . . . . . . . .Drain gas tank / Add fresh fuel mixture
Improper carburetor adjustment . . . . . . . . . . . . . . . . . . .Take to an authorized service dealer for carburetor adjustment
CUTTING HEAD WILL NOT ADVANCE LINE
CAUSE
ACTION
Cutting head bound with grass . . . . . . . . . . . . . . . . . . . .Stop the engine and clean cutting head
Cutting head out of line . . . . . . . . . . . . . . . . . . . . . . . . . .Refill with new line
Inner reel bound up . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Replace the inner reel
Cutting head dirty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Clean inner reel and outer spool
Line welded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Disassemble, remove the welded section and rewind the line
Line twisted when refilled . . . . . . . . . . . . . . . . . . . . . . . .Disassemble and rewind the line
Not enough line is exposed . . . . . . . . . . . . . . . . . . . . . . .Push the bump knob and pull out line until 102 mm
(4 inches) of line is outside of the cutting head
If further assistance is required, contact your authorized service dealer.
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SECTION 8: SPECIFICATIONS
ENGINE
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31.75 mm (1.25 in.)
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 cc (1.9 cu in.)
Clutch Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Centrifugal
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,800-3,600 rpm
Operating RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,100-7,300 rpm
Operating RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,100-9,800 rpm
Ignition Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic
Ignition Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rocker Switch
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 mm (0.020 in.)
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel/Oil Mixture
Fuel/Oil Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32:1
Carburetor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diaphragm, All-Position
Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto Rewind
Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baffled with Guard
Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Spring Return
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 444 ml (15 oz)
DRIVE SHAFT and CUTTING HEAD
Drive Shaft Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steel
Throttle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Finger-Tip Trigger w/Lock-Out
Unit Weight (No fuel, with cutting head, cutting head guard and D-handle) . . . . . . . . . . . . . . . . . . . . 6.69 kg (14.75 lbs.)
Cutting Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-Tooth Cutting Blade, Dual String Cutting Head
Line Spool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bump Line Releaser
Line Spool Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101.6 mm (4 inches)
Trimming Line Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.41 mm (0.095 inches)
Cutting Path Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45.7 cm (18 inches)
Cutting Path Diameter, Cutting Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204 mm (8 inches)
Shoulder Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single Quick-Snap
Maximum Vibration Level (Idle)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.85 m/s2
Maximum Vibration Level (Racing)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.77 m/s2
Maximum Sound Power Level (Idle) ‡ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.3 LweqdB(A)
Maximum Sound Power Level (Racing) ‡ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97.3 LweqdB(A)
* Method for obtaining level per ISO 7916
‡ Method for obtaining level per ISO 7917
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SECTION 9: NOTES
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SECTION 9: NOTES Cont...
OPERATOR’S MANUAL PART NO. 769-00304
PRINTED IN THE USA
8/02
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