8-29. TIMING PROCEDURE. (Internal Timing) (4200 series magnetos )
When installing new or adjusting breaker points and before timing the magneto to the engine, it is important
that the internal timing of the magneto be correct. To find number one tower, the following instructions should
be performed:
—NOTE—
No need to spark out these magnetos.
rotation of the magneto).
b. Turn rotor opposite the rotation of the magneto until the pin engages the gear.
c. If the pin is binding and will not go in the hole in the gear, you have hit the pointer on the gear. Pull the
pin out, enough to continue opposite rotation until the pointer has passed re-insert pin.
d. When the pin sticks through the hole in the gear about 1/4 inch, you are now ready to fire number one
cylinder.
e. After the magneto is installed on the engine, remove the timing pin. The magneto is now ready to be
timed to the engine.
Figure 8-13. Timing Magneto Internally and Assembly
B909
1. TIMING LIGHT
2. WIRE, RED OR GREEN
3. WIRE, BLACK GROUND
4. VENT
THIS SPACE INTENTIONALLY LEFT BLANK
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
POWER PLANT
1K2
