Table 5-3. Direct and General Support Maintenance Troubleshooting (Continued)
TEST OR INSPECTION
ENGINE BACKFIRES (Continued)
Remove the breaker point cover.
Open the points with a screwdriver and inspect them. If they are pitted, burned, or badly oxidized,
replace them and go to Step ic.
Figure 5-186. Gapping Breaker Points
Check the breaker point gap.
Shut the ignition switch OFF.
Crank the engine by hand until the points are open to their widest gap.
If the gap is 0.020 inches (0.52 mm) the gap is ok. Go to Step 2.
If the gap is greater than or less than 0.020 inches (0.52 mm), go to Step 1d.
Reset the breaker point gap.
Rotate the engine by hand until the breaker points reach their greatest gap.