TM 9-2350-247-10START ENGINE (M548A3) — Continued 0014 00CAUTIONAir pump may over speed and be damaged when operated while starter is not operating.Operate air pump only after starter is in operation.NOTEIf tactical situation permits, horn should be sounded to warn personnel that engine is about tobe started.11. Press horn switch.12. Leave throttle lever at idle position.NOTEWithin the first 20 seconds engine should give signs of “firing up” or trying to start. When thishappens, continue to hold the START and air box heater switches for 25 more seconds. Thisadds up to the total 45 seconds for prestart. If, within the first 20 seconds, the engine does notgive 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.0014 00-11
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