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Need help on this:
In our 415 C we have Eiseman magnetos and the ususl
ignition harness. We burn 50% 100 oct. av. and 50% 87 oct. auto fuel and
it seems to run the engine o.k.
Just recently we experienced a rough mag check on
the left mag and the A&P checked out everything and as a last resort took
the top cylinder plugs and put them on the bottom cylinders. The rough mag
went from the left mag to the right mag leading the A& P to suspect non
firing plugs. He changed the plugs and it cleared up for the next several
flights. Today I started the engine which started very easily and on the
mag check the right mag was rough. Not having a mixture control I let the
engine warm up and after several minutes and checking the right mag
several time it cleared up and was normal. I think we have lead deposits
on the plugs and when the engine warms up the lead melts and the problem goes
away. Any thoughts on this?
Don
N94443
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