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Old 09-23-2011, 12:12 PM
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See my notes:

Quote:
Originally Posted by Kelly View Post
Just fishing for comments here.

I am in the population of people who have fried multiple coils with minimal use (two that I purchased plus one that was already on the engine when I bought it). I have just recently lined up my ducks by eliminating possibly mis-matched parts in the ignition circuit: new plugs and wires from Moyer Marine, new Pertronix Flamethrower coil (oil-filled; 40,000V; 3.0Ohm) to go with my Pertronix electronic ignition.

I made a few measurements today with my basic digital volt-meter. Positive was taken from the + on the coil and ground was a near-by head nut.

Results:

1)Everything off: 0.25V BAD should be 0. Leaky switch someplace?
2)Ignition switch on: 11.12V LOW - either bad wiring or a really low battery
3)Cranking engine: 9.3V LOW see above
4)Engine started at idle, cold (no alternator): 11.7V A little low - my alternator will provide current at idle
5)Engine idling at 1000RPM w/ alternator excited: fluctuating from 5.4V to 13.5 Very odd - should be steady around 13.5
6)Engine warm at 1400RPM w/ alternator : settled at 14.04V Normal
7)Engine warm at 800RPM: 13.0V Low to normal, depending on the electrical system total load5, 6 and 7 are with the engine in gear.

I am way over my head here so any comments? Missing information?
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