how to properly ID an I/O setup??

stackz

Master Chief Petty Officer
Joined
May 29, 2008
Messages
830
in the next two weeks I'm going to be visiting my folks. I wanna look over the "old family boat" and be able to write down any/all #'s I'll need....plus take pics for you guys...so you can help me ID the engine and outdrive.

at this point all I know is the boat is a 1979 20' boat with a mercruiser drivetrain. engine is a 4-banger chevy that apparently was also used in commercial equipment. my folks even have another boat with the same drivetrain they got for free and then made me work on it for 2 weeks until I finally got THAT running...

personally, I hate the drivetrain in the boat...but love the boat itself. I grew up on it but that old crappy engine and outdrive left us stranded sooo many times and for some reason my dad just wouldnt give up on it until the head finally cracked back in 96.

anyway, the long/short of this is after I'm done with my own boat, I wanna bring this back to glory since my brother recently had a kid and I've got one on the way...want them to grow up in the same boat.

but damn if it'll have that drivetrain in it. I want to ID it so you guys can tell me if its possible to upgrade to a 5.0 setup. I know it'll fit in the doghouse and a 5.0/302 only weighs another 60lbs versus the current engine as I've had the spare engine on a scale.

I'm emmensely more familiar with the 5.0 engine and would simply like to go this route.

anyway, what info/pics do I need to get you guys??

hell, I've even been reading how some people convert I/O's to outboard setups with some sort of retrofit bracket but I just dont think I'd trust closing in a huge hole in the transom and it not cracking or something goofy like that.
 

cooter2506

Senior Chief Petty Officer
Joined
Apr 8, 2007
Messages
733
Re: how to properly ID an I/O setup??

From what I have read on here before. Going from a 4cyl to an 8 cyl there would be ALOT of work. Need to put in new stringers for the engine mounts to say the least. Lot of glass work to cover them. Also if you want to go to a 5.0 you want the 305 Chevy not the 302 Ford. More parts readily available. Fords havent been used in boats for a while BUT. If you can find a donor boat with a 302 then that would help. Other guys will chime in on this as some of them have done this exchange. But hope fully it is a mercruiser drive and not an OMC they are out of business. Take some pics and get some numbers off the engine and outdrive. That way the pros can tell you what you have and they can tell you more what to do.
 

stackz

Master Chief Petty Officer
Joined
May 29, 2008
Messages
830
Re: how to properly ID an I/O setup??

a 305 or 350 will go in ONLY if I cant find good mounts or outdrive parts for the ford engine.

I have a passionate love for fords and hate for chevy. yeah, I'm one of those guys. haha.

as far as the stringer portion, thats not a problem. just got done redoing all the underfloor in my current boat and I know I will not take this old boat out without having torn up the floor first and getting some work done as I know damn well its going to need it. my dad/grandpa did more "rigging" on this boat back in the day than I've ever seen before.

going to take it down to a hull and redo everything. but thats just how much I love this boat and the memories I have from it.

i swear if I take out the floor and I find my oscar meyer weiney whistle, I'm gonna cry.
 
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