Gullysquash
New member
I have a 1983 Johnson 15hp model J15RCTA. I was given the motor from a friend. I found that the top spark plug was wiggly with oil on that part of the motor and on the inside cover meaning the motor was getting blow by. I am a newby to motors. I used a Heli Coil spark plug repair kit. The new collar and plug are in place but the plug is about one thread off perpendicular but is torqued down properly. I also had to shave off part of a nubbin inside the top of the cylinder head because of the length of the tap. See pic. Are these two issues a big problem or do I start the motor to find out? Nervous. Please help.
