Figure 8A-8. Contact Points
NOTE
No attempt should be made to stone or dress contact points. Should contact
assembly have bad points or show excessive wear, the complete contact
assembly should be replaced.
g. Check the condition of the cam follower felt. Squeeze felt tightly between thumb and forefinger. If
fingers are not moistened with oil, re-oil using 2 or 3 drops of Scintilla 10-391200 lubricant. Allow
approximately 30 minutes for felt to absorb the oil. Blot off the excess with a clean cloth. Too much oil
may foul contact points and cause excessive burning.
h. Check the capacitor mounting bracket for cracks or looseness. Using the Scintilla 11-1767-1, -2 or -3
Condenser Tester or equivalent, check capacitor for capacitance, series resistance and leakage.
Capacitance shall be at least 0.30 microfarads.
i. Check magneto to engine timing as follows:
1. Connect Scintilla 11-851 Timing Light or equivalent across the contact assembly.
2. Slowly bring the engine up to number one cylinder advance firing position as instructed in
Paragraph 8A-30. At this instant the timing light should go out. If it does, the magneto is properly
timed to the engine. If the timing light does not go out, removal of the magneto for internal timing
check and inspection is recommended.
NOTE
The magneto service instructions in this manual are to cover minor repairs
and timing. For further repairs and adjustments of the magneto, it is
recommended that the manufacturer’s recommended service instructions be
followed.
Revised: 8/31/77
2D13
CHEROKEE ARROW III SERVICE MANUAL
POWER PLANT - LYCOMING
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