5
MAINTENANCE AND REPAIR INSTRUCTIONS
CAUSE
ACTION
Old fuel (over 30 days)
Drain fuel tank and add fresh fuel
Fouled spark plug
Replace or clean the spark plug
The outside temperature is above 90˚ F
Move the choke lever to Position 2, press the primer
bulb 10 times, squeeze the throttle control and pull the
starter rope until the unit starts. Run the unit for 2-5
minutes. The unit may be used during this time. Then
move the choke lever to Position 3.
Old fuel (over 30 days)
Drain gas tank and add fresh fuel
Cutting attachment bound with grass
Stop the engine and clean the cutting attachment
Dirty air filter
Clean or replace the air filter
TROUBLESHOOTING
Empty fuel tank
Fill fuel tank with fuel
Primer bulb wasn't pressed enough
Press primer bulb fully and slowly 10 times
Old fuel (over 30 days)
Drain fuel tank and add fresh fuel
Fouled spark plug
Replace or clean the spark plug
Engine is over heated
Move the choke lever to Position 2, squeeze the throttle
control and pull the starter rope until the unit starts. Run
the unit for 2-5 minutes. Then move the choke lever to
Position 3.
Air filter is plugged
Replace or clean the air filter
Old fuel (over 30 days)
Drain fuel tank and add fresh fuel
Improper idle speed
Adjust according to the
Idle Speed Adjustment
section
ENGINE WILL NOT START
ENGINE WILL NOT ACCELERATE
ENGINE WILL NOT IDLE
IF FURTHER ASSISTANCE IS REQUIRED, CONTACT YOUR AUTHORIZED SERVICE DEALER.
ENGINE LACKS POWER OR STALLS WHEN CUTTING
UNIT*
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 4-Cycle
Displacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 cu. in. (29 cc)
Operating RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,800+ rpm
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,800 - 3,600 rpm
Valve clearance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.003 – 0.006 in. (0.076 – 0.152 mm)
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 inch (0.655 mm)
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAE 30 Oil
Crankcase Oil Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.04 oz (90 ml)
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unleaded
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 oz (414 ml)
Approximate Unit Weight (No fuel, with handle, cutting attachment and shield) . . . 11.5 - 13 lbs (5.2 - 5.9 kg)
Cutting Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fixed Line Head
Line Spool Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 in. (76.2 mm)
Trimming Line Diameter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.105 inches (2.67 mm)
Cutting Path Diameter, Trimmer Head. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 inches (43.2 cm)
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
.
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.
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. Drain all gasoline from the gas tank into a container. Do not use gas that has been stored for more
than 30 days. Dispose of the 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 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 with 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.
REPLACING THE SPARK PLUG
Use a replacement part number
753-05784
or Champion
®
#
RDZ4H
spark plug. The correct air gap is
0.025 in. (0.635 mm).
1. Stop the engine and allow it to cool. Remove the six (6) screws on the back of the engine cover with
a Flat-head or T-25 Torx screwdriver (Fig. 33).
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. 33).
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.
tighten loose screws, nuts or bolts. The unit is ready for storage.
WARNING:
To avoid serious personal injury, always turn the unit off and allow it to cool
before cleaning or servicing it.
WARNING:
Do not sand blast, scrape or clean electrodes.
Grit in the engine could damage the cylinder.
Fig. 33
0.025 in.
(0.635 mm.)
CLEANING AND STORAGE
