Troubleshooting Guide (continued)
Additional Problems
Symptom | Possible Cause | Remedy |
Poor acceleration.
Clogged air filter. Clogged fuel filter. Chain brake engaged.
Lean fuel/air mixture. Idle speed set too low.
Clean or replace the air filter.
Replace the fuel filter.
Inspect and/or test brake. Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
Adjust: 2,750(±250)
Engine stops abruptly.
Switch turned off.
Fuel tank empty.
Clogged fuel filter.
Water in the fuel.
Shorted spark plug or loose terminal.
Ignition failure.
Piston seizure.
Reset the switch and restart.
Refuel. See section on “Filling the Tank with Fuel”.
Replace fuel filter.
Drain; replace with clean fuel. See section on “Filling the Tank with Fuel”.
Clean or replace spark plug. See “Specifications” for the correct plug for your unit. Tighten the terminal.
Replace the ignition unit.
Consult with an authorized servicing dealer.
Engine difficult to shut off.
Ground (stop) wire is disconnected, or switch is defective.
Overheating due to incorrect spark plug.
Overheated engine
Test and replace as required.
Replace spark plug. See “Specifications” for the correct plug for your unit.
Idle engine until cool.
Chain rotates at idle speed.
Engine idle too high.
Replace spring/shoes as required, check idle speed. Set idle: 2,750(±250)
Excessive vibration.
Broken clutch spring or worn clutch spring boss Warped or damaged sprocket, chain, or bar.
Bent crankshaft.
Inspect and replace chain components as required.
Consult with an authorized servicing dealer.
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