1971 125hp johson /no spark

bcamp2009

Cadet
Joined
Jul 25, 2009
Messages
12
I am working on 71 125 hp johnson. The motor was running and suddenly stopped after trouble shooting I replaced the coil and the motor started immediately. After about 10 minutes running the motor died again, no spark it again appears to be the coil. What could burn out coils so quickly?
Thanks
 
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