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Thread: Rotax 582 voltage issue

  1. #1

    Join Date
    Apr 2015

    Rotax 582 voltage issue

    I have a rotax 582 in a CGS Hawk. Recently the voltage was running 14.8 or even 14.9. Since the rectifier was 10 years old, I just got a new one and put it in, it is the Key West Controls blue box. After the new one was installed, I ran the motor and within 10 minutes had voltage of 14.8 showing on my EIS, so I put my voltmeter on it and it was reading 14.4. With an electric fuel pump running, the volts would be 14.6 and 14.1 respectively. The voltage readings were done in the shop with the engine at idle.

    The instructions with the rectifier say that the output is supposed to be 13.8.

    What am I missing?

  2. #2

    Join Date
    Aug 2011
    Wachapreague Va.
    Try reading the voltage with several meters. You may find your meter is no longer accurate. Ran into this recently and we tried 4 meters. The expensive fluke meter was wrong by reading 1.1 volt high. The others were witin .1 volt of each other.

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