TM 3-1040-276-10
TROUBLESHOOTING (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
Engine and engine head may become very hot during operation. Do not touch engine or engine head
with bare hand.
Cold air entering a hot engine chamber may cause fire flashback and injury to personnel. Purge hot
gases from engine before removing engine head from a hot generator. Immediately install spare engine
head.
Step 2.
Remove engine head assembly (p 3-11) and check if
engine valve is
broken, frayed,
bent, sticking, or has carbon deposits.
a. if engine valve is damaged, replace engine head assembly with spare and repair
b. If engine valve is not damaged or sticking, go to next step.
CAUTION
Do not treat magneto air pump roughly. When you pump handle, stop short in both directions. Use
short quick strokes about 8 inches long.
Step 3. Check spark from ignition cable/magneto. Disconnect cable (6) from spark igniter (7). Hold
loose end of cable 1/16-inch from frame (8) while pumping magneto air pump handle (9). Look
for spark jumping gap.
a. If no spark or weak spark, report on DA Form 2404 to your supervisor.
b. If strong spark, replace spark igniter (p 3-9).
c. If engine fails to start again, go to step 4.
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