Reply To: Johnson P-35 coil

[PM T2]

I can understand testing coils, but I tend to ignore test results if the thing works when on a magneto plate and the flywheel is spun over.

I have 6 Johnson coils that are loose because they are spares that were re scued from scrap motors. They all pass the primary resistance test. The only one that passes a continuity test is one that has never been used, the others all test to indicate there is no continuity between the secondary leads. The five used coils that fail testing all run motors beautifully. The NOS one isn’t going to get tested on a motor until I get desperate. Same for all my Lockwood Chiefs. None of those Eisemann coils meet anything other than primary resistance check, but they all run the motors they are one. For how long? Maybe another 5 minutes, maybe another 5 years. Dunno, but they will probably fail eventually, but I will bet its not till after I don’t own the motor anymore.Just sayin. Hope it helps.

Best,
PM T2

He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...