Centrifugal Advance
- Check distributor in test stand according to test equipment manufacturer's instructions. Operate distributor both up and down the RPM range and check advance at all RPM settings specified. Adjust or replace springs, weights or cam as necessary.
- If distributor has adjustable driving collar for centrifugal advance, disassemble and lift shaft out. See Fig 1. It is not necessary to remove breaker cam assembly from shaft. To adjust, loosen screws retaining driving collar. If collar is turned in direction of rotation, the advance curve rises. Turning collar in opposite direction of rotation will lower the curve.CAUTION: Centrifugal advance curve must not be adjusted by bending spring clamps of driving collar.
- If distributor does not have adjustable driving collar, adjustment may be made by bending spring anchor tabs to modify spring tension (see Fig 2). To adjust for low speed operation, bend primary spring anchor tab outward to decrease advance, and inward to increase advance. For high speed operation, bend secondary spring anchor tab in or out to obtain specified settings.