Last year I installed a SDS EI system that replaces the left mag. I retained the right mag in my setup. The plane has been in service since year 2000, and the engine has about 400 hours. The top plugs are fired by the SDS, and the bottoms are fired by the mag. The mag was rebuilt last year, and is timed at 25 BTDC.
I am in the middle of the annual condition inspection, and noticed large chunks of lead deposits in (at least) two of the bottom plugs, and another large chuck deposited on the threads of the #3 lower plug hole. Previously, I've never seen much fouling / chunky lead nuggets on my lower plugs - is this to be expected with a hybrid ignition setup like mine, or is it simply coincidental? Note that I have "normal" mag checks with no indications of "missing."
I am in the middle of the annual condition inspection, and noticed large chunks of lead deposits in (at least) two of the bottom plugs, and another large chuck deposited on the threads of the #3 lower plug hole. Previously, I've never seen much fouling / chunky lead nuggets on my lower plugs - is this to be expected with a hybrid ignition setup like mine, or is it simply coincidental? Note that I have "normal" mag checks with no indications of "missing."