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How to connect ignition coils on old 912?

  • przemekmac
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6 months 3 weeks ago - 6 months 3 weeks ago #18067 by przemekmac
How to connect ignition coils on old 912? was created by przemekmac
Hi. During tracking some problems with ignition on my engine I found strange think.
My ignition module A is firing only sparkplugs on TOP and ignition module B is firing spark plugs on the BOTTOM of the engine.
Due to MML of engine:
    Trigger coil assignation (on the 912 Series)
  • Trigger coil A1/2 serves the top spark plug of cylinder 1 and 2
  • Trigger coil A3/4 serves the bottom spark plug of cylinder 3 and 4.
  • Trigger coil B1/2 serves the bottom spark plug of cylinder 1 and 2
  • Trigger coil B3/4 serves the top spark plug of cylinder 3 and 4.

and on my system A is firing only TOP and B only bottom.

I have problem to find in manual correct connection diagram for my module and rotax 912.
I have module with one 4-pin connector and rest singles.
In manual I found only wiring diagram for rotax 914 (not 912) with this kind of modules and from this diagram A is working only twith TOP (as I have connected).
Maybe its missing diagram in manual or I missed something?

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Last edit: 6 months 3 weeks ago by przemekmac.

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