5-8
Troubleshooting
Engine Loses Power • Low crankcase oil level. • Add engine oil.
• High crankcase oil level. • Drain engine oil and replace
with proper quantity.
• Dirty air cleaner element. • Clean air filter separator tube.
• Clean both air filter elements.
• Replace both air filter
elements.
• Dirt or water in the fuel
system.
• Drain fuel system and
replace with fresh, clean fuel.
• Excessive engine load. • Reduce engine load.
• Engine overheated. • Clean cooling fins and
remove any debris from
around engine.
• Faulty spark plugs. • Replace spark plugs.
• Low compression. • See engine manual.
• Exhaust restriction. • Clean spark arrestor.
• See engine manual.
•SMART-SPARK™
malfunction (applicable
models).
• See engine manual.
• Low battery. • Replace battery.
• See engine manual.
• Incorrect governor setting. • See engine manual.
Engine Uses Excessive
Amount of Oil
• Incorrect oil viscosity or type. • Drain engine oil and replace
with proper type.
• Clogged or improperly
assembled breather.
• See engine manual.
• Breather reed broken. • See engine manual.
• Worn or broken piston rings. • See engine manual.
• Worn cylinder bore. • See engine manual.
• Worn valve stems/valve
guides.
• See engine manual.
Problem Possible Causes Corrective Action
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