TM 9-4520-251-14
4-34 SPARK PLUG (CONT)
Location/Item
Action
Remarks
INSPECTION
5. Spark plug
If electrodes are burned away, or porcelain is
cracked or broken, replace spark plug (4).
INSTALLATION
6.
Spark plug
Install spark plug (4) using 13/16-inch plug
wrench.
7.
Cable terminal
Attach cable terminal (3).
8. Spark plug
Replace cap (2) and secure with bail (1).
shield
TESTING
Do not operate heater in enclosed space. Adequate ventilation is re-
quired to prevent buildup of exhaust fumes which can be toxic in con-
centrated amounts.
Wear approved ear protection equipment within 25 feet (7.6 meters) of
operating heater. Failure to do so may result in impairment or loss of
hearing.
9. Spark plug
Start engine. If engine fails to start or misses,
shut off and replace spark plug.
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