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MAINTENANCE AND REPAIR INSTRUCTIONS
Single Line Installation
Go To Step 8 for SplitLine™ Installation:
6. Take approximately 20 feet (6 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 (Fig. 12).
Pull the line through the inner reel so that the loop is as
small as possible.
7. Wind the lines in tight even layers, onto the reel (Fig. 13).
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 12.
SplitLine™ Installation
8. Take approximately 10 feet (3 m) of new trimming line.
Insert one end of the line through one of the two holes
in the inner reel (Fig. 14). Pull the line through the inner
reel until only about 4 inches is left out.
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 (Fig. 14).
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: Failure to wind the line in the direction indicated will
cause the cutting head to operate incorrectly.
12. Insert the ends of the line into the two holding slots
(Fig. 15).
13. Insert the ends of the line through the eyelets in the
outer spool and place inner reel with spring inside the
outer spool (Fig. 16). Push the inner reel and outer
spool together.
NOTE: The spring must be assembled on the inner reel
before reassembling the cutting head.
14. Hold the inner reel in place and install the bump knob
by turning clockwise. Tighten securely.
15. Grasp the ends and pull firmly to release the line from
the holding slots in the reel.
INSTALLING A PREWOUND REEL
1. Hold the outer spool with one hand and unscrew the bump knob counterclockwise (Fig. 10). Inspect the bolt inside the bump knob to make
sure it moves freely. Replace the bump knob if damaged.
2. Remove the old inner reel from the outer spool (Fig. 10).
3. Remove the spring from the old inner reel (Fig. 10).
4. Place the spring in the new inner reel.
NOTE: The spring must be assembled on the inner reel before reassembling the cutting head.
5. Insert the ends of the line through the eyelets in the outer spool (Fig. 16).
6. Place the new inner reel inside the outer spool. 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 spool.
7. Hold the inner reel in place and install the bump knob by turning clockwise. Tighten securely.
AIR FILTER MAINTENANCE
WARNING:
To avoid serious personal
injury, always turn your trimmer off and allow
it to cool before you clean or service it.
Removing the Air Filter/Muffler Cover
1. Place the blue choke lever in Position 2 (Fig. 17).
NOTE: The blue choke lever must be in Position 2 to
remove the air filter/ muffler cover.
2. Remove the four (4) screws securing the air
filter/muffler cover (Fig. 17). Use a T-20 Torx bit
screwdriver.
3. Pull the cover from the engine. Do not force.
Cleaning the Air Filter
Clean and re-oil 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.
1. Remove air filter/muffler cover. Refer to Removing the
Air Filter/Muffler Cover.
2. Turn cover over and look inside to locate the air filter.
Remove the air filter from inside the air filter/muffler
cover (Fig. 18).
3. Wash the filter in detergent and water (Fig. 19). Rinse
the filter thoroughly. Squeeze out excess water. Allow it to dry completely.
4. Apply enough clean SAE 30 oil to lightly coat the filter (Fig. 20).
5. Squeeze the filter to spread and remove excess oil (Fig. 21).
6. Replace the air filter inside the air filter/muffler cover (Fig. 18).
NOTE: Operating the unit without the air filter and air filter/muffler cover assembly will VOID the warranty.
Reinstalling the Air Filter/Muffler Cover
1. Place the air filter/muffler cover over the back of the carburetor and muffler. Align the screw holes.
2. Insert the four (4) screws into the holes in the air filter/muffler cover (Fig. 17) and tighten. Do not
over tighten.
SPARK ARRESTOR MAINTENANCE
1. Remove air filter/muffler cover. Refer to Removing the Air Filter/Muffler Cover.
2. Locate the muffler, but do not remove it. Find the screw on the bottom of the muffler (Fig. 22).
Remove the screw using either a torx #20 or flat blade screwdriver.
3. Carefully pry up the left side spark arrestor hood. Two tabs act as hinges on the right side of the
hood. Flip open the spark arrestor hood like a door and then pull its tabs out of the muffler slots.
4. Using a small flat blade screwdriver, carefully pry the spark arrestor screen out from the inside
of the spark arrestor hood.
5. Clean the spark arrestor screen with a wire brush. Replace it if it is damaged, or if you are
unable to clean it thoroughly.
6. Reinstall the spark arrestor screen snugly back into the spark arrestor hood.
7. Reinstall the two hood tabs into the two muffler slots and flip the spark arrestor hood closed.
8. Replace the screw you removed in Step 2 and tighten it securely.
9. Reinstall the air filter/muffler cover.
WARNING:
If the spark arrestor hood and spark arrestor screen are not tightened securely, they could fall off causing
damage to the unit and possible serious personal injury.
CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable through the air filter/muffler cover (Fig. 23).
NOTE: Careless adjustments can seriously damage your unit. An authorized service dealer should
make carburetor adjustments.
Check Fuel Mixture
Old and/or improperly mixed fuel is usually the reason for improper unit performance. Drain and
refill the tank with fresh, properly-mixed fuel prior to making any adjustments. Refer to Oil and Fuel
Information.
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.
Adjust Idle Speed Screw
WARNING:
The cutting head will spin during idle speed adjustments. Wear protective clothing and observe all safety
instructions to prevent serious personal injury.
If, after checking the fuel mixture 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 screwdriver into the hole in the air
filter/muffler cover (Fig. 23). 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 counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed.
Checking the fuel mixture, 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.
REPLACING THE SPARK PLUG
Use replacement #791-610311B, a Champion RDJ7Y spark plug, or equivalent. The correct air gap is
0.025 inch (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. Grasp the plug wire firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8-inch
socket counterclockwise.
WARNING:
Do not sand blast, scrape or clean electrodes. Grit in the engine
could damage the cylinder.
3. Replace a cracked, fouled or dirty spark plug. Set the air gap at 0.025 in. (0.635 mm) using a
feeler gauge (Fig. 24).
4. Install a correctly-gapped spark plug in the cylinder head. Tighten by turning the 5/8-inch 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.
CLEANING
WARNING:
To avoid serious personal injury, always turn your trimmer off and allow it to cool before you clean or service it.
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 a fueled unit where fumes may reach an open flame or spark.
• Allow the engine to cool before storing.
• Store the unit locked up 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
If you plan on storing the unit for an extended time, use the following storage procedure:
1. Drain all fuel from the fuel tank into a container with the same 2-cycle fuel mixture. Do not use fuel that has been stored for more than
60 days. Dispose of the old fuel/oil mix in accordance to Federal, State and Local regulations.
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 1 oz. (30 ml) of any high quality motor oil or 2-cycle 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. Thoroughly clean the unit and inspect it for any loose or damaged parts. Repair or replace damaged parts and tighten loose screws,
nuts or bolts. The unit is ready for storage.
4
Indexing Teeth
Fig. 11
Fig. 13
Index Teeth
Eyelets
Spring
Fig. 15
Blue Choke
Lever
Position 2
Screws
Screws
Air Filter
Inside Muffler Cover
Fig. 17
Fig. 19
Slots
Spark
Arrestor
Hood
Screw
Tabs
0.025 in.
(0.635 mm)
ENGINE WILL NOT START
CAUSE
On/Off control in the OFF position
Empty fuel tank
Primer bulb wasn't pressed enough
Engine is flooded
Old or improperly mixed fuel
Loop
Fouled spark plug
Fig. 12
Plugged spark arrestor
ENGINE WILL NOT IDLE
CAUSE
Air filter is plugged
Old or improperly mixed fuel
Improper carburetor adjustment
ENGINE WILL NOT ACCELERATE
CAUSE
Loop
Old or improperly mixed fuel
Fig. 14
Cutting head bound with grass
Dirty air filter
Plugged spark arrestor
ENGINE LACKS POWER OR STALLS WHEN CUTTING
CAUSE
Old or improperly mixed fuel
Fouled spark plug
Plugged spark arrestor
CUTTING HEAD WILL NOT ADVANCE LINE
Fig. 16
CAUSE
Cutting head bound with grass
Cutting head out of line
Inner reel bound up
Cutting head dirty
Line welded
Line twisted when refilled
Not enough line is exposed
CUTTING LINE ADVANCES UNCONTROLLABLY
CAUSE
Oil, cleaner or lubricant in cutting head
Fig. 18
ENGINE*
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle
Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.25 in. (31.75 mm.)
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9 cu in. (31 cc.)
Operating RPM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,800+ rpm
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,200 - 4,400 rpm
Ignition Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic
Ignition Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rocker Switch
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 in. (0.635 mm.)
Fig. 20
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel/Oil Mixture
Fuel/Oil Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40:1
Carburetor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diaphragm, All-Position
Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EZ-Pull Version 3™
Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baffled with Guard
Throttle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Spring Return
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 fl.oz. (341 ml.)
DRIVE SHAFT & CUTTING HEAD*
Fig. 21
Drive Shaft Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Steel Tube
Throttle Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Finger-Tip Trigger
Engine
Muffler
Approximate Unit Weight (No fuel, with cutting attachment, shield and D-handle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 lbs. (4.5 kg.)
Cutting Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bump Head™
Shoulder Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Optional
Line Spool Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 in. (76.2 mm.)
Trimming Line Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.080 in. (2.03 mm.)
Cutting Path Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 in. (43.18 cm.)
Spark Arrestor
*All specifications are based on the latest product information available at the time of printing. We reserve the right to make changes at
Screen
any time without notice.
Fig. 22
Idle Speed Screw
Fig. 23
Fig. 24
TROUBLESHOOTING
ACTION
Check to make sure the ON/Off control is in the ON position.
Fill fuel tank with properly mixed fuel
Press primer bulb fully and slowly 10 times
With blue choke lever in position 3, squeeze the trigger and pull the
starter rope
Drain fuel tank and add fresh fuel mixture
Replace or clean the spark plug
Clean or replace spark arrestor
ACTION
Replace or clean the air filter
Drain fuel tank and add fresh fuel mixture
Adjust according to the Carburetor Adjustments section
ACTION
Drain fuel tank and add fresh fuel mixture
Stop the engine and clean the cutting head
Clean or replace the air filter
Clean or replace spark arrestor
ACTION
Drain fuel tank and add fresh fuel mixture
Replace or clean the spark plug
Clean or replace spark arrestor
ACTION
Stop the engine and clean cutting head
Refill with new line
Rewind the inner reel
Clean inner reel and outer spool
Disassemble, remove the welded section and rewind
Disassemble and rewind the line
Push the bump knob and pull out line until 4 inches (102 mm) of line is
outside of the cutting head
ACTION
Clean and thoroughly dry the cutting head
If further assistance is required, contact your authorized service dealer.
SPECIFICATIONS
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