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Full Load Enrichment

  1. With engine at idle speed, pull off plug on idle switch. Engine RPM should go up to 1300 RPM and ignition timing should be 12 degrees BTDC. Pull off plug on throttle switch (full load contact).
  2. Bridge connections on plug with a jumper wire. Engine speed should drop by approximately 100 to 200 RPM and ignition timing will be retarded approximately 4 to 8 degrees. If nothing happens, check wire between throttle switch plug and control unit plug for breaks according to wiring diagram.