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  • Re: Misfires Module B

    by » 5 months ago


    By swapping the appropriate connectors it is possible to resolve a module issue from a coil issue.

     

    Do your modules have...

    Two 6-Pin connectors?

    A 6-pin and 4-pin connector, and a single wire?

    A 4-pin connector and 7 single wires?

     

     


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Bill.Hertzel@Yahoo.com
    Clicking the "Thank You" is Always Appreciated.


  • Re: Misfires Module B

    by » 5 months ago


    I have the 6 pin connectors.  I tried to swap the Ignition boxes to coils connectors.  Moved stuff out of the way, but when I got down there, I could not get the plugs separated.  The horizontal connectors at the top were easy, but the vertical coil connections was more challenging.  My guess is that you have to take the carbs and intake manifolds off to get at the releases to the plugs.  I will need to lift that all anyway to check the short coil connections.  It looks like my spark tester will be here today and I can get started again.....Tom


  • Re: Misfires Module B

    by » 5 months ago


    Well, my spark tester arrived and the tests were not decisive.  I think that at 1800 to 2200 rpm, and firing the plugs on each revolution, it's like an auto engine running twice that fast.  Way too fast of flashing for the naked eye to pick up.  So that was a bust.  I finally swapped the A & B ignition modules at the top. horizontal input connectors.  Wow, the miss moved from B to A !!!  Hallelujah.  If I am reading the prints correctly, that says that everything from those connectors on to the spark plugs is good.  The problem must be between the B connector back to the trigger coil.  I examined the connector and wires but found nothing obvious.  Don't tell me that I need to go the the trigger coils.  That is down behind the engine and looks almost impossible to get to without pulling the engine.  Looking for advice.....Tom 


  • Re: Misfires Module B

    by » 5 months ago


    Well crap.  I think I was wrong.  I forgot that the ignition switch move with the plug.  So, when I moved the B plug to A Module, B switch was still in control, and since the mis moved from B to A that verifies that the trigger coils are indeed working. Do I have it right this time?........Tom


  • Re: Misfires Module B

    by » 5 months ago


    Let's think this through.

    You have the 6+6 connectors.

    The horizontal connector connects to the Stators, Trigger Coils, AND the MAG Switches.

    If the trigger coils ARE the problem, swapping the connector would move the problem AND the MAG Switch at the same time so the problem would remain associated with the same MAG switch.  Making it Appear that nothing changed.

    If the Trigger coils are NOT the problem, then there would be no Problem to swap and all you did was swap the MAG Switches making it appear that the problem moved but in reality, the only thing that was swapped was the MAG Switches.  Meaning the trigger coils are NOT the problem.

    Which condition do you have?

     


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Bill.Hertzel@Yahoo.com
    Clicking the "Thank You" is Always Appreciated.


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