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SUDDEN LOSS OF POWER WITH HEAVY BLACK SMOKE
ENGINE WILL NOT CRANK

TM-5-1940-277-34 Boat Bridge Erection Twin Jet Aluminum Hull Model USCSBMK1 (1940-01-105-5728) Manual
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TM 5-1940-277-34 TROUBLESHOOTING PROCEDURES (Continued) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 3. ENGINE WILL NOT CRANK Step 1. Check battery cells specific gravity (refer to TM 5-1940-277-20). a. Replace battery (refer to TM 5-1940-277-20). b. If battery check satisfactory go to step 2. Step 2. Check-for defective starting switch (refer to TM 5-1940-277-20). a. Replace defective starting switch (refer to TM 5-1940-277-20). b. If switch operates correctly go to step 3. Step 3. Check for faulty wiring and connections (refer to page 2-109). a. Repair faulty wiring (refer to page 2-109). b. If wiring satisfactory go to step 4. Step 4. Test starter (refer to TM 5-1940-277-20). a. If voltage not present replace starter solenoid (refer to TM 5-1940-277-20). b. If voltage present but starter does not function replace starter (refer to TM 5-1940-277-20). Step 5. Check for hydrostatic lock. a. Attempt to hand crank engine. b. If engine will not turn over by hand, remove injectors one at a time until locked cylinders are freed.  (Refer to TM 5-1940-277-20). c. If engines still will not turn go to step 6. Change 1    2-6







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