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  • Re: Only running on Cylinders 3 and 4 how is this even possible

    by » one year ago


    I did as you described. I found the fault it was a broken wire where the trigger coils attach to the lower module. I spliced it and it is running good now.

    Thank you for the help!!!


  • Re: Only running on Cylinders 3 and 4 how is this even possible

    by » one year ago


    Have you confirmed that it is running on all 8 plugs and not just 4?
    Runs equally well on either MAG alone?


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


  • Re: Only running on Cylinders 3 and 4 how is this even possible

    by » one year ago


    Yes I have confirmed. Both modules running. 


  • Re: Only running on Cylinders 3 and 4 how is this even possible

    by » one year ago


    back to building 

    Thanks!

    Thanks!

    Thanks!

     


  • Re: Only running on Cylinders 3 and 4 how is this even possible

    by » 3 months ago


    Well all. I finished the plane and flew 5 hours on it and it was running very smooth. Then I started to get an excessive mag drop. It would run terrible on either mag and one mag did not always ground out (I could tell it wanted to keep running as I cut both mag switches-I tested the circuit to the switches and it is fine). Ran awfully rough on either mag. I hooked up a timing light to each spark plug wire, they all worked except the top forward most starboard cylinder. I swapped the modules. problem moved to the bottom forward most starboard cylinder. So I assumed a module was going bad. Ordered two new aftermarket modules. Installed both. Still runs rough. Runs rough on both mags. Found a broken wire, this time it is the other red wire (One opposite the one I fixed previously which I erroneously called a trigger coil wire, I think it is actually a stator wire see attached). Fixed that. Problem persists. 

    Not sure where to go from here. Heavy maintenance manual? Where can I get a copy of that. I assume that I will need to test all my 4 pin connectors (old engine) and my coils. Not sure where to start on that I assume the manual.

    Appreciate any help.

     

    thanks,

     

    33239_2_CDI wiring diagram Rotax 4shurplugs.pdf (You do not have access to download this file.)

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