START ENGINE (M548A3) Continued
Air pump may over speed and be damaged when operated while starter is not operating.
Operate air pump only after starter is in operation.
If tactical situation permits, horn should be sounded to warn personnel that engine is about to
11. Press horn switch.
12. Leave throttle lever at idle position.
Within the first 20 seconds engine should give signs of firing up or trying to start. When this
happens, continue to hold the START and air box heater switches for 25 more seconds. This
adds up to the total 45 seconds for prestart. If, within the first 20 seconds, the engine does not
give signs of firing up or trying to start, go to Step 20.
13. Press and hold START switch.
14. Press and hold air box heater switch.