all day event....

[oldcatamount]

This is one of the coils from a 1967 6hp Johnson. Note the corrosion inside the spark plug wire socket. I worked on this motor all day before I discovered it. So, I'm replacing both coils and also both spark plug wires. How do you suppose the corrosion started?

 

[F_R]

Re: all day event....

Can't tell, but if the pin did not actually pierce the wire strands, it would arc across the tiny space between pin and wire. The more it arcs, the worse it gets as the metals are eroded away. Needless to say, make sure you have a secure electrical connection when you replace the parts. Best to check your work with a resistance check (multimeter)