Well...2 1/2 gallons of salt water
sounds bad, but it ain't necessarily so. No need to try and turn the engine over though, you'll probably do more harm than good. The engine has to come out anyway, so pull it, drop the pan and pull a rod brg. Bet they're not too bad. Even if they are, a crank can be ground, the question is at which point do you stop repairing and start replacing? When I first read your inquiry my thought was the governor would be a mess. Turns out that that engine is hydraulically governed, so no worries there (I think). But if the engine is well and truly seized, the pistons may be too corroded to use (but probably not). You will have to replace the liners, bearings, seals
pump, but as you know that is normal in a rebuild. Of course that is if you want to have an easy starting, full power engine. You may well be able to break the engine loose, but diesels are even more dependent on compression
that gas engines, and any losses will definitely affect performance.
So to get to your question, it depends. There's a low hour 4-107 on ebay for 2750.00 right now. It's from a generator
, but depending on how it's governed, it could be a direct replacement or you may have to swap your fuel pump
. Of course it's used so
are you buying
someone else's problems? My boats' engine is a Volvo
MD2020 (Perkins M20) that I paid 400.00 for 3 years ago. It runs fine as purchased, no smoke, starts instantly. The only maintenance
so far, besides oil and filter changes has been to rod out the exhaust elbow
So if when you open it up and the actual bearing surfaces on the crank and cam shaft are pitted (not just coated or discolored) and/or any of the timing gears are pitted, I'd guess that, unless you have a friend in a machine shop, it might be time to start looking at the benefits of replacement versus rebuilding.
And of course that leaves the question "What is the intended use for the boat?" I realize this might be anathema to a lot of people, but I'd be much more inclined to use a boat with an engine I beat apart with a 2x4 and a hammer in a protected waterway than on a circumnavigation