Table 4-2. Troubleshooting-Continued

TM 10-3930-632-12

Table 4-2. Troubleshooting-Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE-Continued

7. ENGINE STALLS ON IDLE.

Step 1. Check carburetor throttle valve and idle mixture adjustment.

Adjust carburetor (para 4-42).

Step 2. Check carburetor for dirt or water in idler passages.

Replace carburetor.

Step 3. Inspect intake manifold for leaks.

Replace manifold gaskets or tighten mounting nuts.

Step 4. Check spark plugs for incorrect gap or defective condition.

Clean or replace plugs. Set gap.

Step 5. Check ignition timing.

Reset timing (para 4-64).

Step 6. Test engine compression.

Report to general support maintenance personnel.

Step 7. Check for water leaks in cylinder head and head gasket.

Replace cylinder head (para 4-65).

8. ENGINE MISFIRES ON ONE OR MORE CYLINDERS.

Step 1. Inspect spark plugs for dirty or cracked condition.

Clean, adjust, or replace plugs.

Step 2. Check for grounded spark plug wires.

Replace plug wires.

Change 1 4-6