ENGINE STARTS BUT MISFIRES AND RUNS ROUGH

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ENGINE CRANKS SLOWLY (NORMAL START ATTEMPT)

TM-5-1940-277-20 Boat Bridge Erection Twin Jet Aluminum Hull MODEL USCSBMK1 (1940-01-105-5728) MODEL USCSBMK2 (1940-01-218-9165) Manual

ENGINE OVERHEATS (ENGINE AUDIBLE ALARM ACTIVATES)

TM 5-1940-277-20

TM 1940-20/2

Section IV. TROUBLESHOOTING (Continued)

MK1 and MK2 w/SABRE

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

5. ENGINE STARTS BUT MISFIRES AND RUNS ROUGH.

Step 1.

Check valve adjustment (refer to paragraph 3-128).

a. Adjust valves (refer to paragraph 3-128).

6. ENGINE DOES NOT DEVELOP FULL POWER.

Step 1.

Check air filter (refer to paragraph 3-133).

a. Clean air filter (refer to paragraph 3-133).

b. Replace air filter (refer to paragraph 3-133).

Step 2.

Check turbocharger (refer to paragraph 3-123).

Step 3.

Inspect throttle control head assembly for looseness, disconnection, or damage.

a. Repair throttle control head assembly (refer to paragraph 3-33).

b. Replace defective throttle control head assembly (refer to paragraph 3-34).

Step 4.

Inspect engine throttle cable.

Step 5.

Disengage transmission and check engine response.

7. ENGINE OVERHEATS (ENGINE AUDIBLE ALARM ACTIVATES).

a. MK1

2-20

Change 2