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Generator Output Test

  1. Ensure connections at battery, generator and starter are clean and tight. Ensure generator, engine and body are properly grounded. Ensure drive belt is adjusted and in good condition.
  2. Connect charging/starting system tester according to manufacturer's instructions. Operate engine at 2000 RPM. Generator output should be 90-110 amps.
  3. If generator output is low, repair or replace generator. If reading is 16-20 amps less than generator rating, replace regulator. If output is still low, repair or replace generator.