PRECISE TIMING PROCEDURE
1. Use a standard timing light. Note that most dialback
type timing lights will not work correctly with
dual fire applications. If you have a dial-back timing
light, set the dial-back to zero. Do not enable multispark
while setting timing.
2. The precise timing procedure is based on using the
35° BTDC timing mark and race maximum
advance curve with VOES grounded (low manifold
pressure) that reaches 35° BTDC at 2,500 RPM
(refer to Figure 4). To use this procedure, you must
have a properly functioning VOES switch
connected.
3. Set mode switch to 0 for dual fire or 2 for single
fire. Set advance slope switch to 9. Connect the
timing light pickup to the front cylinder spark plug
cable. Loosen standoffs securing the ignition unit.
Run the engine at a steady speed just over 2,500
RPM. Rotate the ignition to center the 35° BTDC
timing mark in the inspection hole. Tighten
standoffs and verify that the timing has not
changed. When done, change mode and advance
slope switches back to desired values.
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