Shindaiwa 81642 Troubleshooting Guide continued, Additional Problems, Symptom, Possible Cause

Troubleshooting Guide (continued)

ADDITIONAL PROBLEMS

ADDITIONAL PROBLEMS

Symptom

Poor acceleration.

Engine stops abruptly.

Engine difficult to shut off.

Possible Cause

Clogged air filter.

Clogged fuel filter.

Lean fuel/air mixture.

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.

Remedy

Clean or replace the air filter.

Replace the fuel filter.

Consult with an authorized servicing dealer. Adjust: 2,750 (±250) rpm (min-1)

Reset the switch and re-start.

Refuel. See page 9.

Replace filter.

Drain; replace with clean fuel. See page 9.

Clean or replace spark plug with a Champion CJ8 or equivalent type spark plug of the correct heat range.

Replace the ignition unit.

Consult with an authorized servicing dealer.

Test and replace as required.

Overheating due to incorrect spark plug.	Replace spark plug with a Champion CJ8 or
	equivalent spark plug of the correct heat
	range.

Cutting attachment rotates at engine idle.

Excessive vibration.

Cutting attachment will not rotate.

Overheated engine.

Engine idle too high.

Broken clutch spring or worn clutch spring boss.

Loose attachment holder.

Warped or damaged cutting attachment.

Loose gearcase.

Bent main shaft/worn or damaged bushings.

Shaft not installed in powerhead or gearcase.

Broken shaft.

Damaged gearcase.

Idle engine until cool.

Set idle: 2,750 (±250) rpm (min-1)

Replace spring/shoes as required, check idle speed.

Inspect and re-tighten holders securely.

Inspect and replace attachment as required.

Tighten gearcase securely.

Inspect and replace as necessary.

Inspect and reinstall as required.

Consult with an authorized servicing dealer. Consult with an authorized servicing dealer.

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