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Is the engine overheating?
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.
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.
Engine is rough at all speeds.
May also have black smoke
and/or unburned fuel at the
exhaust.
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.
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.
Engine is knocking.
Overheating condition.
Improper fuel.
Carbon deposits in the combustion
chamber.
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.
What To Check
Possible Cause
Remedy
Troubleshooting Guide (continued)
LOW POWER OUTPUT