Guys and Gals: I have a wonderful 1962 Evinrude 5.5 outboard motor that has been in the family since it was new. The manual calls for J-4-J spark plugs and I can't find one anywhere. The current plugs are about 15 years old and I would like to replace them. I have been to stores that sell "marina" plugs but I can't find this J-4-J. Any advice? I have always gotten good advice before.