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Centrifugal Advance Test

  1. Connect Timing Tester (VW 1367 ) according to manufacturer's instructions. Disconnect both vacuum hoses from vacuum diaphragm and plug vacuum retard hose. Start and run engine at 900 RPM.
  2. Bring timing mark back to pointer by using dial on timing light. Initial (base) ignition timing should be indicated. Increase engine RPM slowly. Centrifugal advance mechanism should start advancing timing at 1050-1150 RPM.
  3. Increase engine speed to 2400 RPM. Bring timing mark back to pointer by using dial on timing light and read centrifugal advance. Increase engine speed to 3800 RPM. Bring timing mark back to pointer by using dial on timing light and read centrifugal advance.
  4. To determine total centrifugal advance, subtract base ignition timing from reading. After testing, reconnect vacuum hoses, adjust base ignition timing and idle speed.
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