Shindaiwa EVC 81715, HT2510/EVC, DH2510/EVC manual Symptom Possible Cause Remedy

Troubleshooting Guide (continued)

	ADDITIONAL PROBLEMS
Symptom	Possible Cause	Remedy
	Clogged air cleaner element.	Clean the air cleaner element.
Poor acceleration.
	Clogged fuel filter.	Replace the fuel filter.
	Carburetor mixture too lean.	Consult with an authorized servicing dealer.
	Idle speed set too low.	Adjust: 3,000 (±250) RPM (min-1).
	Switch turned off.	Reset the switch and re-start.
Engine stops abruptly.
	Fuel tank empty.	Refuel.
	Clogged fuel filter.	Replace fuel filter.
	Water in the fuel.	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.
	Shorted spark plug or loose terminal.	Clean and replace spark plug, tighten the terminal.
	Ignition failure.	Consult with an authorized servicing dealer.
	Piston seizure.
	Ground (stop) wire is disconnected,	Test and replace as required.
Engine difficult to shut off.	or switch is defective.
	Overheating due to incorrect spark plug.	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.
	Overheated engine	Idle engine until cool. Refer to page 7.
		(overheated engine).
	Engine idle too high.	Set idle: 3,000 (±250) RPM (min-1).
Cutting attachment moves at
	Broken clutch spring or worn clutch spring boss.	Replace spring/shoes as required, check idle speed.
engine idle.
	Warped or damaged cutters.	Inspect and repair cutters as required.
Excessive vibration.
	Loose gearcase.	Tighten gearcase securely
	Damaged crankshaft/worn or damaged bushings.	Inspect and replace as necessary.
	Damaged/worn clutch.	Inspect and replace as required
Cutting attachment will not move.
	Damaged gearcase	Consult with an authorized servicing dealer.

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