Ok, I have a 1987 Sea Ray Seville with 3.0 Mercruiser in it. What type of spark plug do I need? When searching I get "To 0F353100" and things like that. I'm assuming it's talking about the serial number, but I am 200 miles away from my boat, and was planning on bringing plugs up to it this weekend. Any suggestions? I was thinking about putting NGKs in it. Thanks. Also, what type of oil do you recommend for this motor?
