ARMY TM 9-6115-670-14&P 5-6 3.  ENGINE STARTS, BUT STOPS WHEN START-PREHEAT SWITCH IS RELEASED. STEP 1. Check to see if START-PREHEAT SWITCH was held in the start position long enough. a.  If START-PREHEAT SWITCH was not held in start position long enough, restart generator using procedures in TM holding switch in start position longer. b.  If START-PREHEAT SWITCH was held long enough, proceed to step 2. STEP 2. Check for adequate fuel level in vehicle fuel tank. a.  If vehicle fuel tank is low, service vehicle fuel tank. b.  If vehicle fuel tank has adequate amount of fuel, proceed to step 3. STEP 3. Check for restricted air filter.  Inspect Air Flow Restriction Indicator (SICPS only) and visually inspect air filter element. a.  If the air filter is restricted or the filter element is dirty, SERVICE Air Filter. b.  If the Air Filter is clean and not restricted, proceed to step 4. STEP 4. Check for low oil level (Para. 3.6). a.  If engine oil level is low, SERVICE engine oil (Para. 3.6). b.  If engine oil level is between notches on the oil dipstick, notify next higher level of maintenance.