AC Generator Test

Symptoms for faulty generator:

  1.  Weak of intermittent spark

  2.  No spark

  3.  Battery continually discharging

  4.  Slow throttle response

 Steps to correct:

  1.  Clean the flywheel

  2.  Set the pickup Coil air gap to 0.025” / 0.635mm.

To test the generator, set the multi-meter to a 1K ohms scale. Check the ohms from the white/red wire to the generator case or ground as shown in the picture. Ohms reading should between 105-115 ohms; replace if 100 ohms or less.

To check the output voltage, the generator must be installed and multi-meter set to AC small scale. Probe the red lead to the white/red wire and the black lead to the batter or chassis ground. Push the starter button with the flywheel turning the voltage should read 0.5 to 1.5 volts AC. If reading is low, replace the A/C generator…

To test the exciter coil, set the multi-meter to a 1K ohms scale. Check the ohms from the white/red wire to the generator case or ground as shown in Figure 1.2. Reading should be 0.815-0.830K ohms. If the readings are outside this range replace the A/C generator.