4
MAINTENANCE
TROUBLESHOOTING
PROBLEM
SOLUTION
ENGINE WILL NOT START, IDLE OR ACCELERATE
Empty fuel tank
Fill fuel tank with fuel
Primer bulb wasn't pressed enough
Slowly press primer bulb 10 times
Old fuel
Drain gas tank and add fresh fuel
Fouled spark plug
Replace or clean the spark plug
Air fi lter is plugged
Replace or clean the air fi lter
Improper idle speed
Adjust according to the Idle Speed
Adjustments section.
ENGINE LACKS POWER OR STALLS
Old fuel
Drain gas tank and add fresh fuel
Fouled spark plug
Replace or clean the spark plug
CUTTING HEAD WILL NOT ADVANCE LINE OR ADVANCES UNCONTROLLABLY
Cutting head bound with grass
Stop engine and clean cutting head
Cutting head out of line
Refi ll with new line
Inner reel bound up
Rewind inner reel
Cutting head dirty
Clean inner reel and outer spool
Line welded
Disassemble, remove the welded section and
rewind
Line twisted when refi lled
Disassemble and rewind the line
Not enough line is exposed
Push bump knob and pull line out until 4
inches (102 mm) of line is exposed from cutting
head
Oil, cleaner or lubricant in cutting head
Clean and thoroughly dry the cutting head
SPECIFICATIONS
Engine Type .............................................................................................................. Air-Cooled, 2-Cycle
Displacement .................................................................................................................................. 25 cc
Operating RPM ........................................................................................................................6,300 rpm
Idle Speed RPM ..........................................................................................................3,200 – 4,400 rpm
Spark Plug Gap .................................................................................................... 0.025 inch (0.635 mm)
Lubrication .....................................................................................................................Fuel/ Oil Mixture
Fuel/ Oil Ratio ................................................................................................................................... 40:1
Fuel Tank Capacity .........................................................................................................10 fl .oz. (296 ml)
Approximate Unit Weight (No fuel) ......................................................................10 - 11 lbs. (4.5 - 5 kg)
Trimming Line Diameter ............................................................................................ 0.080 in. (2.03 mm)
Cutting Path Diameter .................................................................................................. 17 in. (43.18 cm)
UNIT*
* All
specifi cations 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.
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.
2. Grasp plug wire fi rmly and pull.
3. Clean around spark plug and remove using a 5/8-inch socket counterclockwise.
4. Set the air gap, according to specifi cations, using a feeler gauge
(Fig. 11).
5. Install spark plug turning clockwise and torquing as stated:
•
Torque to:
110-120 in.•lb. (12.3-13.5 N•m)
Do not over tighten.
CLEANING
Do not use strong detergents or household cleaners that contain aromatic oils such as pine and
lemon, or solvents such as kerosene, which can damage plastic housing or handle. Use a small brush
to clean unit and wipe off any moisture with a soft cloth.
STORAGE
•
Never store a fueled unit where fumes may reach an open fl ame 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 planning on storing the unit for 30 days or more, use the following storage procedure:
1. Drain all fuel from fuel tank into a container and dispose in accordance with Federal, State and
Local regulations.
2. Start the engine and allow it to run until it stalls to ensure that all fuel has been drained from the
engine and allow to cool.
3. Remove the spark plug and put 3 - 5 drops of motor oil into cylinder. Pull starter rope slowly to
distribute oil and reinstall the spark plug.
NOTE:
Remove spark plug and drain all oil from cylinder before attempting to start unit after
storage.
4. Thoroughly clean unit and inspect for any loose or damaged parts. Repair or replace parts and
tighten loose screws, nuts or bolts.
WARNING:
Do not sand blast, scrape or clean
electrodes. Grit in the engine could damage the cylinder.
Fig. 11
0.025 in.
(0.635 mm)
