TM 5-3740-214-14
Table 5-3. Direct and General Support Maintenance Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE OPERATES ERRATICALLY (Continued)
Figure 5-147. Spark Plug Defects
(5)
Broken insulator and/or bent electrode.
NOTE
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.
Figure 5-148. Spark Plug Gap
c.
Check the spark plug gap.
(1)
Reset the gap at 0.025 inches (0.64 mm) if necessary and go to Step 2d.
(2)
If the gap is ok, go to Step 2d.
5-135
