Troubleshooting.guide - Shindaiwa 68907-94311 Owner's/Operator's Manual

Troubleshooting Guide
What To Check
Does the engine crank?
YES
Good compression?
YES
Does the tank contain fresh
fuel of the proper grade?
YES
Is fuel visible and moving in
the return line when priming?
YES
Is there spark at the spark
plug wire terminal?
YES
Check the spark plug.
ENGINE DOES NOT START
Possible Cause
Faulty recoil starter.
NO
Fluid in the crankcase.
Internal damage.
NO
Loose spark plug.
Excess wear on cylinder, piston, rings.
Fuel incorrect, stale, or contaminated;
NO
mixture incorrect.
Check for clogged fuel filter and/or vent.
NO
Priming pump not functioning properly.
The ignition switch is in "O" (OFF) position.
NO
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.
Remedy
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 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.
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.).
13