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Thanks for the opinions. I guess I'll forget the 115's and keep looking at the 135, 140, 150's. My motor is an 89 and pushes the boat along at about 30MPH and 33MPH with a tail wind which is just fine. I am not looking to captain a rocketship I just don't want to be at the helm of a barge. I am mostly thinking about dependability and fuel economy. Assuming I stay with a 2S any opinions on fuel consumption between the 135, 140, 150's? Is it enough to consider or is the decreased horsepower going to cost more to push the boat? Lastly, the 89 generaly runs well. Last year I repalced the powerpacks and shortly thereafter one of the headgaskets went. That's when I got disguted and put the boat away for the rest of the summer. Is it worth rebuilding a motor this old?
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Since it generally runs well, I'd be reluctant to write it off too quickly.
Whether it's worth rebuilding depends a lot on how much of the work you can do yourself, as opposed to having a mechanic do it all, and how much (if any) additional damage was done from the blown head gasket leaking water into the cylinder.
A running V6 is always of some value to some one who's isn't. .... Head gaskets are not a big job. As long as there's no water damage, that may be all you need to do. I'd do a compression check first to get a baseline, and then pull the heads. Look for corrosion and water intrusion, especially on the blown side. Maybe all you'll need is a gasket. If compression is down (below 90#) on the rest of the cylinders besides the bad one, but even, then a rebuild to freshen it up is the way to go, but I'd start seriously thinking "new motor" before that much of a rebuild. Since you're asking about rebuilding, I have to assume that you're not likely to be able to be rebuilding it yourself and will be having to pay "full price", so to speak for the rebuild.
There's a lot of 20 year old motors being run every day.
Darlene