Reply To: Coil Testing for Johnson HD25

[Stewart Mayer]

I think you are completely right, that would explain why we got intermittent spark from one coil, but can’t get a reading on the secondary coil.  Thank you!  I’ll try to find some replacement coils.  If anyone has two replacement HD25 style coils for sale or donation, please let me know 🙂

I read here that you can’t swap the coils of a different part over the laminated plates, like you can on some, but I still ordered a few cheap lawnmower style ones of amazon that looked like they had potential, just to try. If we have success I’ll update the forum.