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Ignition Timing: Specifications

Ignition Timing (Firing Point)
Timing At RPM TDC +/- 2 at Cranking Degrees At RPM (deg @ rpm)
Below 20 at Idle Degrees At RPM (deg @ rpm)
18 - 22 at 4000 Degrees At RPM (deg @ rpm)
Without vacuum, intake air temperature sensor plug pulled off.
29 - 33 at 4000 Degrees At RPM (deg @ rpm)
With vacuum, intake air tempertaure sensor plug pulled off.
Dwell 10 - 54 % or 9 - 49 degrees at Cranking rpm
30 - 60 % or 27 - 54 degrees at 4000 rpm