Shindaiwa 81642 manual LOW Power Output

Troubleshooting Guide (Continued)

LOW POWER OUTPUT

What To Check Possible Cause Remedy

Is the engine overheating?

Engine is rough at all speeds.

May also have black smoke and/or unburned fuel at the

exhaust.

Engine is knocking.

Operator is overworking the unit.

Carburetor mixture is too lean.

Improper fuel ratio.

Fan, fan cover, cylinder fins dirty or damaged.

Carbon deposits on the piston or in the muffler.

Clogged air filter.

Loose or damaged spark plug.

Air leakage or clogged fuel line.

Water in the fuel.

Piston seizure.

Faulty carburetor and/or diaphragm. Overheating condition.

Improper fuel.

Carbon deposits in the combustion chamber.

Shorten trimmer line. Cut at a slower rate.

Consult with an authorized servicing dealer.

Refill with clean fresh unleaded gasoline with a pump octane of 87 or higher, mixed with Shindaiwa Premium 2-cycle mixing oil at a 50:1 gasoline/oil ratio.

Consult with an authorized servicing dealer.

Consult with an authorized servicing dealer.

Clean or replace the air filter.

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

Repair or replace filter and/or fuel line.

Refill with fresh fuel/oil mixture. See Page 9.

Consult with an authorized servicing dealer.

See above.

Check fuel octane rating; check for presence of alcohol in the fuel. Refuel as necessary.

See page 9.

Consult with an authorized servicing dealer.

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