TM 9-2350-247-10START ENGINE (M548A1) — Continued 0013 00CAUTIONNormal idle is 650–700 rpm, and normal coolant temperature is 160F–230F (71C–110C). Ifyou let the engine run at idle for too long, the engine could cool below 140F (60C). Runningbelow 140F (60C) for very long can damage the engine. Run the engine at 1,200–1,500 rpm tokeep coolant temperature in the normal range.8. When the engine starts, set the hand throttle to run the engine at 800–1000 rpm for 3–5 minutes. This is to warm up thecoolant and get all the oil warm and circulating.9. Push the hand throttle IN. Check that the engine idles at 650–700 rpm.10. When the engine is warmed up, do the During (D) Preventive Maintenance Checks and Services (WP 0057 00).0013 00-5
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