kawasaki fs730v-bs07 coils

A

ACF

Well-Known Member
have a kawasaki fs730v-bs07 that i have replaced the coils run good for a little while then shut down coil on the right coil was real hot , no spark so changed coils again run for couple hours then stop would not start checked for spark no spark. my question what would cause the coils go bad. used after market coils not oem
thanks
AC
 
Could just be an aftermarket coil issue, But could also be caused by battery voltage backfeeding the coils causing them to burn out. Even momentary battery voltage at the kill tab on the coil will instantly burn them out.
 
The issue is likely not using OEM parts. You might have saved a few bucks, but it has cost you a lot of time. The Kawasaki replacement coil part number is either 21171-0740 or 21171-0809 (new, superseded number). Make sure the air gap is set correctly. Coils will get very hot with heat soak from the engine.

Applying voltage to the coil could cause the diode to fail internally. Typically, this would not affect the spark.
 
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