Figure 8A-9. Rotor Holding Tool Installed Figure 8A-10. Timing Kit Installed
8A-28. REMOVAL OF MAGNETO. Before removing the magneto, make sure magneto switches are off.
a. Remove the harness assembly terminal plate from the magneto.
WARNING
The magneto is not internally grounded; when the ground lead is
disconnected, the magneto is hot. Removing the harness assembly terminal
plate first and installing them last minimizes the danger of starting the
engine accidentally when the ground lead is removed from the magneto.
b. Disconnect the ground lead at the magneto.
c. Remove the nuts and washers and draw the magneto from the engine.
8A-29. TIMING PROCEDURE (INTERNAL TIMING).
a. Remove the cover to the contact(s), distributor block, etc.
b. To internally time the contact assembly of the single-breaker magnetos, proceed as follows:
1. Loosen the nut securing the drive plate to the magneto shaft sufficiently in order to install the
Scintilla 11-8465 Rotor Holding Tool under the nut and flat washer as shown in Figure 8A-9.
Tighten the nut securely.
2. Remove the timing inspection plug from the top of the magneto. Turn rotating magneto to proper
neutral position. This position is determined by locating keyways on drive end of magnet shaft at
12 o’clock with respect to name plate on housing. Tighten adjusting knob of 11-8465 Rotor
Holding Tool until pressure is applied on housing flange preventing magnet from turning.
3. Loosen and rotate cam until cam follower of contact assembly rests on highest point of cam lobe.
Adjust contact assembly to obtain the clearance of 0.016 of an inch. Tighten contact assembly
securing screws to 20-25 inch-pounds.
Revised: 8/31/77
2D14
CHEROKEE ARROW III SERVICE MANUAL
POWER PLANT - LYCOMING
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