ARMY TM 9-6115-671-14 AIR FORCE TO 35C2-3-446-32 MARINE CORPS TM 09249A/09246A-14 4-16 TABLE 4-4.  UNIT TROUBLESHOOTING (CONTINUED) OK   OK   Yes Not OK   Not OK   OK   Not OK   Not OK   Check for clogged or defective fuel filter/water separator.  Refer to   TM 9-2815-259-24. OK   ENGINE CRANKS, BUT FAILS TO START (CONTINUED) Replace fuel filter/ water separator.   Refer to TM 9-2815-259-24. Check for defective fuel supply pump.   Refer to TM 9-2815-259-24. Notify next higher level of maintenance. Replace fuel supply pump.  Refer to   TM 9-2815-259-24. Continued from previous page. Check Actuator LED (11, Fig 2-3). Is it lit during cranking ? Yes Is Overspeed LED (10,Fig.2-3) lit ? No Replace Speed Control Module (see Para 4.8.22). No Push RESET BUTTON on overspeed module (13, Fig.2-3).  Repeat starting procedure. Check for contaminated fuel.  (see para.3.3.6) or incorrect grade of fuel (Table 3-3). Using fuel drain valve, (figure 4-1), drain  fuel into suitable container.  Replace fuel filter and fuel/water separator.  Refer to TM 9-2815-259-24.  Service fuel tank (see para. 3.3.6).  Bleed fuel lines.  Refer to TM 9-2815-259-24. Check for evidence of air bubbles or fuel line blockage. Unblock or replace fuel lines as necessary (see para.4.11.1). Ensure fuel lines are tight. Bleed fuel lines. Refer to TM 9-2815-259-24. Check for blocked exhaust pipe or muffler (see para.4.9.1). OK   Unblock exhaust pipe or replace muffler (see para.4.9.1). Not OK   Not OK