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Is the engine overheating?
Engine is rough at all
speeds. May also have
black smoke and/or
unburned fuel at the
exhaust.
Operator is overworking the unit.
Carburetor mixture is too lean.
Improper fuel ratio.
Fallen leaves or debris on intake cover.
Fan, fan cover, cylinder ns dirty
or damaged.
Carbon deposits on the piston or
in the mufer.
Clogged air cleaner element.
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.
Use a lower throttle setting.
Consult with an authorized
servicing dealer.
Rell with clean, fresh unleaded gasoline
with a pump octane of 87 or higher, mixed
with a premium 2-cycle air cooled mixing oil
or equivalent at a 50:1 gasoline ratio.
Clean the intake cover.
Clean, repair or replace as necessary.
Consult with an authorized
servicing dealer.
Service the air cleaner element.
Tighten or replace the spark plug.
See page 11.
Repair or replace fuel lter and/or
fuel line.
Replace the fuel. See page 7.
Consult with an authorized
servicing dealer.
See above.
Check fuel octane rating; check for
presence of alcohol in the fuel. See
page 7. Refuel as necessary.
Consult with an authorized
servicing dealer.
What To Check Possible Cause Remedy
LOW POWER OUTPUT
Engine is knocking.
Troubleshooting Guide (continued)