Fish Whisperer
Cadet
- Joined
- Apr 26, 2008
- Messages
- 13
I recently acquired an old 1964 5.5 evimrude fisherman. I want to replace the spark plugs and the ones that came out of it were champion J4J. On the link I found on this site about tune-up for this motor, they recommend champion J6C. Are these plugs interchangeable?