6C13G11
9-14
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Ignition system
Yes
Out of specification?
No
Check the ignition system, fuel
system, lubrication system, or
cooling system.
Check the valve clearances or
disassemble and check the
engine.
Check the condition of the spark
plugs.
Clean, adjust, or replace the
spark plugs.
No
Check the ignition spark using
the ignition tester.
WARNING
• Do not touch any of the connections of the ignition tester leads.
• Do not let sparks leak out of the removed spark plug caps.
• Keep flammable gas and liquids away, since this test can produce
sparks.
Good condition?
Yes
Yes
Check the fuel system and com-
pression pressure.
No
Yes
Good condition?
Adjust or replace
the pulser coil.
Good spark?
Check the pulser coil output
peak voltage, resistance, or
pulser coil air gap.
Check the engine stop lanyard
switch for continuity.
Continued on next page.
No
Power unit
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