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14
Troubleshooting Guide (continued)
ADDITIONAL PROBLEMS
Poor acceleration.
Clogged air cleaner element.
Clogged fuel filter.
Carburetor mixture too lean.
Idle speed set too low.
Switch turned off.
Fuel tank empty.
Clogged fuel filter.
Water in the fuel.
Shorted spark plug or loose terminal.
Ignition failure.
Piston seizure.
Ground (stop) wire is disconnected,
or switch is defective.
Overheating due to incorrect spark plug.
Overheated engine
Engine idle too high.
Broken clutch spring or worn clutch spring boss.
Warped or damaged cutters.
Loose gearcase.
Damaged crankshaft/worn or damaged bushings.
Damaged/worn clutch.
Damaged gearcase
Clean the air cleaner element.
Replace the fuel filter.
Consult with an authorized servicing dealer.
Adjust: 3,000 (±250) RPM (min
-1
).
Reset the switch and re-start.
Refuel.
Replace fuel filter.
Drain and refill with fresh, clean unleaded gasoline
with a pump octane of 87 or higher mixed with a
2-cycle air cooled mixing oil that meets or exceeds
ISO-L-EGD and/or JASCO FC classified oils at 50:1
gasoline/oil ratio.
Clean and replace spark plug, tighten the terminal.
Consult with an authorized servicing dealer.
Test and replace as required.
Replace the spark plug with a NGK CMR5H or
equivalent spark plug of the correct heat range.
Adjust the spark plug electrode gap 0.6 mm.
Idle engine until cool. Refer to page 7.
(overheated engine).
Set idle: 3,000 (±250) RPM (min
-1
).
Replace spring/shoes as required, check idle speed.
Inspect and repair cutters as required.
Tighten gearcase securely
Inspect and replace as necessary.
Inspect and replace as required
Consult with an authorized servicing dealer.
Symptom Possible Cause Remedy
Engine stops abruptly.
Engine difficult to shut off.
Excessive vibration.
Cutting attachment moves at
engine idle.
Cutting attachment will not move.