All kidding aside, It's obvious that the original poster views this boat as a disposable good. Since he's getting it almost free, why not just take it, use it til it dies, and toss it? If the 903's are beyond reasonable repair or to the point of a major costing more than a repower to smaller more efficient engines, then do it. If you have low cost access to good power then repower the boat but keep it a twin screw setup. I doubt you'll gain much in efficiency running at hull speed but you will have a roomier serviceable ER. Rebuilding the 903's won't be cheap so in this case the repower would make sense given the intended use of the owner. Yes it will be next to impossible to sell but he's already stated that that isn't an issue for him. Besides if he can get a set of engines and all materials needed for the repower for say 12K-15K, that's a whole lot less than the price to major the 903's. In the end if he does decide to sell the boat, he'd probably loose more money if he spent the cash to major the engines as opposed to the repower and giving the boat away. I guess the question that needs to be answered is what would it cost for him to rebuild the 903's? If he can DIY them for similar or less than the repower to small engines, then he should rebuild them and keep the boat as she was built. This way he'll have similar running cost at hull speed but the ability to run faster if needed.
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