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Magnetos, Ignition Coils and Spark Plugs Discussion about magnetos, buzz coils, spark plugs, ignitors and low tension coils.

Magnetos, Ignition Coils and Spark Plugs

Wico OC No spark when hot


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  #1  
Old 08-11-2019, 07:54:31 PM
con-rad con-rad is offline
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Default Wico OC No spark when hot

Hey all,

I have a few OC mags that spark great when in the shop, but once I put them on my engine and let the sun hit them for a while, they lose spark. I thought it might be a condenser, so i replaced it in one mag, just to have the same issue. Any other ideas? Do the coils or magnets get weak with heat?

Connor
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Old 08-11-2019, 08:33:57 PM
Greg Mosley Greg Mosley is offline
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Default Re: Wico OC No spark when hot

Greetings Con-rad, Possibly a bad coil. As it warms up, either the windings produce an open circuit or short out. Try to re-create the situation with a hair dryer. Be sure you have a sparkplug attached and grounded properly other wise damage to the coil could occur. Enuf Said
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Old 08-12-2019, 01:51:57 AM
cobbadog cobbadog is online now
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Default Re: Wico OC No spark when hot

Sure sounds like a coil problem breaking down and the spark tracking to earth. A new coil should resolve your problem.
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Old 08-19-2019, 08:51:15 PM
con-rad con-rad is offline
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Default Re: Wico OC No spark when hot

Did some prodding with a multimeter and sure enough I have a bad coil. Thanks!
connor
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