Table 5-3. Direct and General Support Maintenance Troubleshooting (Continued)
TEST OR INSPECTION
ENGINE STOPS SUDDENLY (Continued)
Remove the spark plug by hand.
Figure 5-97. Spark Plug Defects
Check the spark plug visually. Replace it and go to Step 3, if there are:
Cracks in the insulator.
Electrodes worn so thin they cannot be regapped.
Soft, wet, oily deposits covering the insulator and the plug nose.
Build-up of deposits between insulator and the plug shell.
Broken insulator or bent electrode.
If the spark plug must be replaced, set the gap at 0.025 inches (0.64 mm).
Oil fouling is a sign of internal engine damage.