Shindaiwa HT231 - Manual (Page 19)

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Troubleshooting Guide
Does the engine crank?
Good compression?
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.
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.
Priming pump not functioning properly.
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.
The plug is damaged internally or
of the wrong size.
Consult with an authorized
servicing dealer.
Tighten and re-test.
Consult with an authorized
servicing dealer.
Refill with clean, fresh unleaded
gasoline with a pump octane of 89 or
higher, mixed with a 2-stroke air cooled
engine oil that meets or exceeds ISO-
L-EGD and/or JASO FD classified oils
at 50:1 gasoline/oil ratio.
Replace fuel filter or vent as required.
Re-start.
Consult with an authorized
servicing dealer.
Move switch to “I” (ON) position
and re-start.
Consult with an authorized
servicing dealer.
Crank the engine with the plug
removed, re-install the plug and re-
start.
Clean and re-gap the plug to
0.6 mm (0.024 in.). Re-start.
Replace the plug with a NGK CMR5H
or equivalent resistor type spark plug
of the correct heat range. Set spark
plug electrode gap to 0.6mm (0.024
in.).
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What To Check Possible Cause Remedy
ENGINE DOES NOT START
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