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Troubleshooting Guide
ENGINE DOES NOT 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.
Tighten and retest.
NO
YES
Does the tank contain fresh
fuel of the proper grade?
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.
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.
Replace fuel filter or vent as required. Restart.
NO
Is there spark at the spark
plug wire terminal?
The ignition switch is in “O” (OFF)
position. Shorted ignition system.
Faulty ignition unit.
Move switch to “I” (ON) position and re-start.
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,
replace the plug, and re-start.
Clean and re-gap the plug to 0.024 inch
(0.6 mm). Re-start.
Replace the plug with a Champion CJ8 or
equivalent type spark plug of the correct
heat range.
YES
What To Check
Possible Cause
Remedy