Re: newbie questions
Howdy from Canada!
Welcome to iboats! As you can see, there's lots of good help and advise here.
I agree with the boys opinions on the boat you're looking at. I didn't know Chris Craft made an aluminum runabout. If that's what it actually is, you may be on to a collectable here that could be worth a few bucks when you're done. Also, the 3.7 L/ 470-Merc could be parted-out for about 3-times the purchase price of the boat; especially if it has the 4-barrel manifold (about $300/US on ebay) and a 4-inch heat exchanger (another $2 - 300. on ebay).
I'd do a compression test on it first then, depending on the results, make a decision on whether or not to run with it. If you do service the 470 up to snuff, and the Chris Craft is as light as I think it is, you'll be sitting on a 50-mph boat that won't kill you on gas. The 470-Merc is arguably the most powerful (pound for pound) sterndrive ever built.
That said, there are some things (quirks) you need to know about the 470 before you decide to run with it; ie. - camshaft seals/the imperative to run a 4-inch heat exchanger/alternator conversion etc...
There's lots of help here on this engine or you can also join the forum at Breezeworks.com. It's chaulk-full of guys who run with these engines.
If the engine is toast I'd recommend (as I have done with my older boat I've just bought) that you repower with a brand new set-up; either a Merc or a Volvo V-6.
Sure, it'll set you back some serious coin but you'll have peace-of-mind that comes with a warranty, reliability, and the knowledge that she'll get you and your loved ones home at the end of the day. Trust me on this one. Like a lot of other guys on this forum, I've pissed away huge coin trying to make something out of a piece of crap.
I can't tell you how excited I am now in anticipation of the dawn of the day when I get to flash my new engine for the first time.
I wish you the same. Happy Boating!
Terry
"Out on the water... one is overcome by that special sense of serenity found nowhere else. Go fishing, or maybe drag a giggling kid behind on a tube. Crack a cold-one, crack the throttle and cruise man. Cruise like there's no tomorrow!"