I have an atomic 4 in my pearson 10m , 1974
spark plug is rusted in cyl #1, engine runs but plug hasnt been changed for 3 years. Now that its my boat, I'd like to fix that.. I tried wd 40..afraid to break it off..
how do I know if I have a direct drive or v drive? where can I read up on these?
I'd like to try and change the impeller as well..I think I need more than wd 40..