AIR FILTER MAINTENANCE
Cleaning the Air Filter
Failure to maintain your air filter properly can result in poor performance or can cause
permanent damage to your engine.
1. Open the air filter cover by unscrewing the cover screw (Fig. 33).
2. Remove the air filter (Fig. 33).
3. Wash the filter in detergent and water. Rinse the filter thoroughly and allow it to dry.
4. Apply enough clean SAE 30 motor oil to lightly coat the filter.
5. Squeeze the filter to spread and remove excess oil.
6. Replace the air filter (Fig. 33).
NOTE:
Operating the unit without the air filter will VOID the warranty.
7. Reinstall the air filter cover. Insert the hooks on the air filter housing into the slots
on the air filter cover (Fig. 34).
8. Swing the air filter cover to the right and align the cover screw with the cover
screw hole (Fig. 34). Tighten the cover screw to secure the air filter cover.
NOTE:
Do not over tighten as this may strip the screw.
IDLE SPEED ADJUSTMENT
NOTE:
Careless adjustments can seriously damage the unit. An authorized
service dealer should make carburetor adjustments.
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 run for one 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 idle adjustment screw (Fig. 35 ). Turn the idle
speed screw
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 #
753-06193
, a
Champion RDJ7J
spark plug, or equivalent. The correct air gap is
0.025 inch (0.635 mm)
.
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.
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. 36).
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
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.
Short Term Storage (1-2 weeks)
1. Store the unit in a horizontal position. If this is not possible, store the unit vertically with the engine at the top.
Long-term Storage
1. Remove the fuel cap, tip the unit and drain the fuel into an approved container.
NOTE:
Do not use gasoline that has been stored for more than 30 days. Dispose of old gasoline in accordance with
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 5 drops 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 unit after storage.
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.
CAUSE
ACTION
Engine overspeed protection engaged
Allow the engine to cool down for 10 minutes before
restarting.
5
INSTALLING A PREWOUND REEL
1. Hold the outer spool with one hand and unscrew the bump knob
(Fig. 24). 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. 24).
3. Remove the spring from the old inner reel (Fig. 24).
4. Place the spring in the new inner reel.
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 (Fig. 32).
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 counterclockwise. Tighten securely.
WARNING:
Do not sand blast, scrape or clean electrodes. Grit in
the engine could damage the cylinder.
Fig. 36
0.025 in.
(0.635 mm)
Fig. 33
Air Filter Housing
Air Filter
Air Filter
Cover
Fig. 35
Idle Adjustment Screw
MAINTENANCE AND REPAIR INSTRUCTIONS
CAUSE
ACTION
Old or improperly mixed fuel
Drain fuel tank and add fresh fuel mixture
Fouled spark plug
Replace or clean the spark plug
CAUSE
ACTION
Old or improperly mixed fuel
Drain fuel tank and add fresh fuel mixture
Cutting head bound with grass
Stop the engine and clean the cutting head
Dirty air filter
Clean or replace the air filter
CAUSE
ACTION
Empty fuel tank
Fill fuel tank with properly mixed fuel
Primer bulb wasn't pressed enough
Press primer bulb fully and slowly 10 times
Engine is flooded
With blue choke lever in position 3, squeeze the trigger
and pull the starter rope
Old or improperly mixed fuel
Drain fuel tank and add fresh fuel mixture
Fouled spark plug
Replace or clean the spark plug
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
Rewind the inner reel
Cutting head dirty
Clean inner reel and outer spool
Line welded
Disassemble, remove the welded section and rewind
Line twisted when refilled
Disassemble and rewind the line
Not enough line is exposed
Push the bump knob and pull out line until 4 inches (102 mm)
of line is outside of the cutting head
CAUSE
ACTION
Oil, cleaner or lubricant in cutting head
Clean and thoroughly dry the cutting head
CAUSE
ACTION
Air filter is plugged
Replace or clean the air filter
Old or improperly mixed fuel
Drain fuel tank and add fresh fuel mixture
Improper idle speed
Adjust according to the Idle Speed Adjustment section
TROUBLESHOOTING
ENGINE WILL NOT START
ENGINE WILL NOT IDLE
ENGINE WILL NOT ACCELERATE
IF FURTHER ASSISTANCE IS REQUIRED, CONTACT AN AUTHORIZED SERVICE DEALER.
ENGINE LACKS POWER OR STALLS
CUTTING LINE ADVANCES UNCONTROLLABLY
CUTTING HEAD WILL NOT ADVANCE LINE
WARNING:
To avoid serious personal injury, always turn the unit off and allow it to cool before you
clean or service it.
ENGINE STOPS WHILE IN USE
WARNING:
The cutting attachment will spin during idle speed adjustments. Wear protective clothing
and observe all safety instructions to prevent serious personal injury.
Engine Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle
Stroke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.10 in. (2.8 cm)
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 cc
Operating RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,800+ rpm
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,800 - 3,400 rpm
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 in. (0.635 mm)
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel/Oil Mixture
Fuel/Oil Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40:1
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 fl.oz. (414 ml)
Total Approximate Unit Weight (without fuel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 lbs. (4.5 kg)
Cutting Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-Tooth Cutting Blade, Bump Head™
Trimming Line Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.105 inches (2.67 mm)
Cutting Path Diameter, Trimmer Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 inches (45.7 cm)
Cutting Path Diameter, Blade Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 inches (204 mm)
Shoulder Strap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single Quick-Snap
SPECIFICATIONS*
*All specifications 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.
Fig. 34
Hooks
Cover
Screw Hole
Slots
Cover Screw
Air Filter Housing
Air Filter Cover
