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582 Generator bench tests?

in 2 Stroke Technical Questions 11 years ago

  • Re: 582 Generator bench tests?

    by » 11 years ago

    Nick,

    Resistance values for the tach (grey) wire are 30-35 ohms for the old style and 35-40 ohms for the new style generator. There is an old service bulletin that warn of wire breakage in the older generators. In them, the grey wire is soldered to a resistor which is mounted on the stator and vibration causes a break at this resistor. Fix is to move this resistor outside the engine away from the stator.

    Mag drop readings on the 582s are notoriously unreliable. The tach is reading six pulses per revolution normally, but when you switch half the system to ground during a mag check, the tach sometimes goes nuts on some engines. I have buddies who just ignore the tach and listen to the engine during mag checks.

    Bill.
      
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  • Re: 582 Generator bench tests?

    by » 11 years ago

    Nick,

    Another quick fix is just forget the grey wire and install a Tiny Tach.

    Bill.
      
    Report

  • Re: 582 Generator bench tests?

    by » 11 years ago

    Nick has it ever worked 100% satisfactory for you.
      
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  • Re: 582 Generator bench tests?

    by » 11 years ago

    Nick (Axworthy),

    Have you found anything that cures this problem? I have never been able to come up with a sure fire answer. It just seems that some engines have the problem and some never do.

    Bill.
      
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  • Re: 582 Generator bench tests?

    by » 11 years ago

    Hi All

    The standard ROTAX did work .....then didn't

    Tried a Tiny Tach , at least a ebay clone but although it worked lashed up (taped on the side) , on the shadow (Tandem -pusher) I had to lengthen the wire and that seemed to stop it working.

    It is all rather a pain.

    Thanks for all the help
    Cheers
    Nick
      
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