Figure 74-23. Contact Points
7. 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.
8. 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.
9. Check magneto to engine timing as follows:
A. Connect Scintilla 11-851 Timing Light or equivalent across the contact assembly.
B. Slowly bring the engine up to number one cylinder advance firing position. 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.
Effectivity 74-11-01
PA-28RT-201 Page 74-24
December 1, 1978
3E9
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
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