Troubleshooting Guide - Shindaiwa C3410 Operator's Manual

Maintenance

Troubleshooting Guide

Diagnosis
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 ter-
minal?
YES
Check the spark plug.
The engine does not start
Cause
Faulty recoil starter.
NO Fluid in the crankcase.
Internal damage.
Loose spark plug.
Excess wear on cylinder, pis-
NO ton, rings.
Valves not seating.
Fuel incorrect, stale, or con-
taminated; mixture incorrect.
NO
Check for clogged fuel filter
and/or vent.
NO
Priming pump not functioning
properly.
The ignition switch is in Stop
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 improper-
ly gapped.
NO
The plug is damaged internally
or of the wrong size.
34
Solution
Consult your dealer
Tighten and re-test.
Consult your dealer
Refill with fresh, clean unleaded
gasoline with a pump octane of 89
or higher mixed with a 2-cycle air
cooled mixing oil that meets or ex-
ceeds ISO-L-EGD and/or JASO
FC, FD classified oils at 50:1 gas-
oline/oil ratio.
Replace fuel filter or vent as re-
quired. restart.
Consult your dealer
Move to the Start position.
Consult your dealer
Crank the engine with the plug re-
moved, reinstall the plug, and re-
start.
Clean and regap the plug to 0.6
mm. Restart.
Replace the plug with an NGK
CMR5H or equivalent resistor type
spark plug of the correct range.
Set spark plug electrode gap to 0.6
mm.