I have an early 60's to 70
I have an early 60's to 70's 40hp Johnson outboard (No ID plate). The spark plugs that were in it were J6C champion. They are also in my 1970 Evinrude 33 hp 33052M. After going to get new plugs and checking with the parts counter for engines between those years. I should be running a J8C (a hotter plug). I'm a little ify on using those. Just want verification from marine experts.
What's the difference between marine and normal plugs?
Thanks
I have an early 60's to 70's 40hp Johnson outboard (No ID plate). The spark plugs that were in it were J6C champion. They are also in my 1970 Evinrude 33 hp 33052M. After going to get new plugs and checking with the parts counter for engines between those years. I should be running a J8C (a hotter plug). I'm a little ify on using those. Just want verification from marine experts.
What's the difference between marine and normal plugs?
Thanks