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Hi,
I had a problema that you can have too and to my knowledge there is no reason for this.

The ignition modules are done by Ducati, I flew my plane and nex day when I tried to start it both modules failed to provide a spark, both where totally dead, I checked all the wires, connections, etc. etc. and everything was perfect.

In one fórum I read that somebody in Germany had the same problema and the Rotax mechanics and the tecnicians at Ducati didn´t know the cause but for my surprise they heal again by itself when they ran at over 2000 rpm so I did the test and it really works!

I removed the A module and left the bad B module and installed a borrowed A module from a friend, I started the engine and it fired! at over 2000 rpm I turned the switch of the module A off and it was running on the module B, then I switched the A on again and switched off the module B and like magic the module A was working again!

Then I installed my bad A module and started the engine with the good module B, after the engine run at over 2000 rpm I turned the module B off and also my bad A module was running again.

After this in the magneto test when I did the test of both magnetos I have a drop of only 100 rpm at each magneto and since this day I never had a problem with the ignition modules.
20171101_102543Copiar.jpg (You do not have access to download this file.)
  • Re: Ignition modules suddenly failed and how they got life again

    by » 7 years ago


    Could it be that the mere act of disconnecting and reconnecting the ignition wires cleaned up one or more faulty connections?

  • Re: Ignition modules suddenly failed and how they got life again

    by » 7 years ago


    The sensitivuty of the inductive inputs on the ignition module are affected by temperature and the amplitude of the signals from the inductive pickups are affected by cranking speed during starting. So battery voltage and temperature can have an affect on the performance of the ignition modules during starting. If you have the same problem again, try heating the ignition modules with a hot air gun or hair dryer (don't make them too hot!) or charge the battery for 15 minutes and see if that makes a difference. If your ignition modules are developing a fault then you can send them to Carmo in the Netherlands, see here:

    https://www.carmo.nl/index.php?main_page=index&cPath=671_2711_4918

    Usually you only realise that you have a problem when your second ignition module starts to fail as the failure of the first one is masked by the one that still works correctly. Once the engine is running the output from the inductive pick ups is large enough to drive the faulty unit.

  • Re: Ignition modules suddenly failed and how they got life again

    by » 7 years ago


    Could it be that the mere act of disconnecting and reconnecting the ignition wires cleaned up one or more faulty connections?


    No it was checked , I clean all the connections and nothing!
    It was until I replaced one of the bad modules that the other module fixed, then with the fixed module I did the same with the remainng bad module.

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