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CHECKING & MEASURING
CENTRIFUGAL ADVANCE
INDUCTIVE TIMING LIGHT
1. Leave distributor vacuum line disconnected
and plugged.
2. Press and hold down
button. Note
position of timing mark at idle speed.
3. Slowly increase engine speed to 2500 RPM, or other speed specified
by manufacturer. Timing mark should move smoothly in opposite
direction of engine rotation. Note degrees advance at higher RPM.
4. Subtract degrees advance at idle from degrees at higher speed.
Difference is amount of centrifugal advance.
5. Slowly decrease engine speed to idle RPM. Timing mark should move
smoothly in direction of engine rotation, and return to idle position.
NOTES
ADVANCE READING (RPM NOTED
IN SERVICE MANUAL OR VECI)
TIMING AT IDLE
CENTRIFUGAL ADVANCE