
12
NO
NO
YES
NO
YES
NO
YES
YES
NO
YES
Does the engine
crank?
Does the tank contain
fresh fuel of the proper
grade?
Is fuel visible and
moving in the return
line when priming?
Is there spark at
the spark plug wire
terminal?
Check the spark plug.
The plug is damaged internally or of
the wrong size.
What To Check
Possible Cause
Remedy
ENGINE DOES NOT START
Faulty recoil starter.
Fluid in the crankcase.
Internal damage.
Loose spark plug.
Excess wear on cylinder, piston, rings.
Fuel incorrect, stale, or
contaminated; mixture incorrect.
Check for clogged fuel filter and/
or vent.
The ignition switch is in “O” (OFF)
position.
Shorted ignition ground.
Faulty ignition unit.
If the plug is wet, excess fuel may
be in the cylinder.
The plug is fouled or improperly
gapped.
Consult with an authorized
servicing dealer.
Tighten and re-test.
Consult with an authorized
servicing dealer.
Refill with fresh, clean unleaded gasoline with
a pump octane of 87 or higher mixed with 50:1
Shindaiwa Premium 2-cycle mixing oil or with
an equivalent high quality 2-cycle mixing oil.
Replace fuel filter or vent as required.
Restart.
Move switch to “I” (ON) position and
restart.
Consult with an authorized servicing
dealer.
Crank the engine with the plug removed,
reinstall the plug, and restart.
Clean and regap the plug to 0.6mm-
0.7mm. Restart.
Replace the spark plug. Check the
unit Specifications page for the proper
spark plug for your unit. Restart.
Good compression?
Troubleshooting Guide
Valves not seating.