ARMY TM 9-6115-670-14&P 4-14 3. ENGINE STARTS, BUT STOPS WHEN START-PREHEAT SWITCH IS RELEASED. STEP 1. Check for dirty or clogged fuel filter. a.  If fuel filter is dirty or clogged, SERVICE fuel filter (para 4.30.). b.  If the fuel filter is clean, proceed to step 2. STEP 2. Check for clogged oil filter assembly. a.  If oil filter is clogged, SERVICE oil filter assembly (para 4.14.). b.  If oil filter is clear, proceed to step 3. STEP 3. Test for defective START-PREHEAT switch. a.  If START-PREHEAT switch is defective, REPLACE switch (para 4.62.). b.  If START-PREHEAT switch is functioning properly, proceed to step 4. STEP 4. Check for defective low oil pressure sender switch. a.  If low oil pressure sender switch is defective, REPLACE defective oil pressure sender switch (para 4.17.). b.  If oil pressure sender switch is functioning properly, proceed to step 5. STEP 5. Check if WATER TEMP indicator light is on. a.  If the WATER TEMP light is on, refer to SYMPTOM 11. b.  If the high coolant temperature indicator light is not lit, proceed to step 6. STEP 6. Check for defective fuel transfer pump. a.  If the fuel transfer pump is defective, REPLACE fuel transfer pump (para 4.31.). b.  If the fuel transfer pump is functioning properly, proceed to step 7. STEP 7. Test for defective DAY TANK LEVEL switch and LOW FUEL CUT-OFF switch (para 4.32. or 4.33.). a.  If the defective DAY TANK LEVEL switch or the LOW FUEL CUT-OFF switch are defective, REPLACE defective switch (para 4.32. or 4.33.). b.  If the DAY TANK LEVEL switch and LOW FUEL CUT-OFF switch are functioning properly, notify next higher level maintenance.