Filter
Top Products
15
Troubleshooting Guide
ENGINE DOES NOT START OR HARD TO START
Does the engine crank?
Faulty recoil starter.
Fluid in the crankcase.
Internal damage.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
Consult with an authorized servicing dealer.
NO
Good compression?
Loose spark plug.
Excess wear on cylinder, piston, rings.
Valves not seating.
Tighten and re-test.
NO
YES
Does the tank contain
fresh fuel of the proper
grade?
Refill with fresh, clean unleaded gasoline with
a pump octane of 87 or higher mixed with
a 2-cycle air cooled mixing oil that meets or
exceeds ISO-L-EGD and/or JASO FC classified
oils at 50:1 gasoline/oil ratio.
Fuel incorrect, stale or contaminated;
mixture incorrect.
NO
YES
Is fuel visible and moving
in the return line when
priming?
Check for clogged fuel filter and/or vent.
Priming pump not functioning properly.
Replace fuel filter or vent as required; restart.
Consult with an authorized servicing dealer.
NO
Is there spark at the spark
plug wire terminal?
The ignition switch is in “O” (OFF)
position.
Shorted ignition ground.
Faulty ignition unit.
Move switch to “I” (ON) position and restart.
NO
YES
YES
Check the spark plug.
If the plug is wet, excess fuel may be in
the cylinder.
The plug is fouled or improperly gapped.
The plug is damaged internally or of the
wrong size.
Crank the engine with the plug removed,
reinstall the plug, and restart.
Clean and regap the plug to 0.024 - 0.028
inch (0.6 - 0.7 mm). Restart.
Replace the plug with an NGK CMR5H or
equivalent resistor type spark plug of the
correct heat range. Set spark plug electrode
gap to 0.024-0.028 inch (0.6-0.7 mm).
YES
What To Check Possible Cause Remedy