Troubleshooting Guide - Shindaiwa 68800-94313 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 OR HARD TO START
Possible Cause
Faulty recoil starter.
NO
Fluid in the crankcase.
Internal damage.
Loose spark plug.
NO
Excess wear on cylinder, piston, rings.
Valves not seating.
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)
NO
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.
Remedy
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
a -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; restart.
Consult with an authorized servicing dealer.
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 0.04 - 0.08
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 0.04-0.08 inch (0.6-0.7 mm).
15