wdaniell.longport(at)gmai
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 Posted: Fri Aug 21, 2020 2:23 pm Post subject: headset crackle part 2 |
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I changed the plugs and one loose plug cap as advised by Joe.
To recap: I have a Rotax 912 turbo with stock ignition. It started with a crackle in the deadset that rose and fell with engine power. This occurred in mid flight after a normal mag check. Prior to this the Dynon Skyview had been without abnormal noise.
On landing I found that the switching off the left mag silenced the crackle and switching off the right mag made the engine run rough.
Trouble shooting today: The CDIs have two "in" connectors from the pick ups and two "out" connectors to the coils. So I swapped the CDIs. Also I tried to start the engine with only one CDI connected to one "out" connector. Both CDI work with both "in"-connectors but both only work with one "out" connector to the coils. I tried starting the engine with only one CDI. It starts fine when the single CDI is connected to the right coil and when "wrong" coil the engine wont start. This leads me to the conclusion that I have a problem between the CDI and the plugs. In other words I have a problem in the coil system or in the HT/plug area.
Agreed?
If so, what is my next step? How do I test the coils?
Will
William Daniell
LONGPORT
+1 786 878 0246
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