Shindaiwa HT2510/EVC manual What To Check Possible Cause Remedy, Is the engine overheating?

Troubleshooting Guide (continued)

	LOW POWER OUTPUT
What To Check	Possible Cause	Remedy
	Operator is overworking the unit.	Cut at a slower rate.
Is the engine overheating?
	Carburetor mixture is too lean.	Consult with an authorized servicing dealer.
	Improper fuel ratio.	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.
	Fan, fan cover, cylinder fins dirty or damaged.	Clean, repair or replace as necessary.
	Carbon deposits on the piston or in the muffler.	Consult with an authorized servicing dealer.
	Clogged air cleaner element.	Service the air cleaner.
Engine is rough at all speeds.
May also have black smoke and/	Loose or damaged spark plug.	Tighten or replace. Replace the spark plug with a
or unburned fuel at the exhaust.		NGK CMR5H or equivalent spark plug of the correct
		heat range. Adjust the spark plug electrode gap to 0.6
		- 0.7 mm.
	Air leakage or clogged fuel line.	Repair or replace fuel filter and/or fuel line.
	Water in the fuel.	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.
	Piston seizure.	Consult with an authorized servicing dealer.
	Faulty carburetor and/or diaphragm.
	Overheating condition.	See above.
Engine is knocking.
	Improper fuel.	Check fuel octane rating; check for presence of
		alcohol in the fuel (page 5). Refuel as necessary.
	Carbon deposits in the combustion chamber.	Consult with an authorized servicing dealer.

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