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Troubleshooting Guide (continued)
What To Check
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.
20
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LOW POWER
Possible Cause
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 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.
Remedy
Operate at slower rate.
Consult with an authorized servicing
dealer.
Refill with fresh, clean unleaded gasoline with a
pump octane of 87 or higher mixed with a 2-cycle
mixing oil that meets or exceeds ISO-L-EGD and/
or JASO FD classified oils at 50:1 gasoline/oil ratio.
Clean, repair or replace as necessary.
Consult with an authorized servicing dealer
Clean or replace the air filter
Tighten or replace the spark plug. Restart.
Check the Specifications page in this
manual for the correct spark plug for this
unit.
Repair or replace fuel filter and/or fuel
line.
Refill with fresh fuel/oil mixture.
Consult with an authorized servicing
dealer.
Consult with an authorized servicing
dealer.
Check fuel octane rating; check for
presence of alcohol in the fuel. Refuel as
necessary.
Consult with an authorized servicing
dealer.
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