Mercruiser 305 tune-up

tmh

Lieutenant Junior Grade
Joined
Aug 16, 2006
Messages
1,136
I'm trying to get my 20 yr. old Mercruiser V-8 200hp 305 2bbl running as best it can. I don't know if the last tune-up was one yr ago or much more, so I'm going to replace plugs/wires and buy the tune-up kit here at iboats. The site here has a great cross-reference for wires and the tune-up kit I need. My question is, what spark plugs should I buy? Is there a brand/type to look for or any marine plugs OK? Also, do they come pre-gapped or do i need to do this during installation?

Thanks.
 
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