i used to service and maintain 8 for a oil field drilling company, who used the engines on small crew boats. those should be the GEN I's which do not have the nice upgrades as the Gen II's i.e. non-forged pistons, different bearings etc. like stated earlie S/C's would crap out if there was water splashing on the engine alot. other than that the engine really isnt a bad engine. its a very neat design but the weight is out of this world. make sure the boat can handle it. the DTS system is really nice. if he buys them maintenence, maintenence, maintence, make sure he changes the engine oil, oil filter, L/U oil, and grease the engine every year. also use mobil 1 full syn. we would run the engines with different oils, then at 50 hours of usage we would pull and engine report and change the oil then send a sample to chevron's lubewatch and it turned out that the Mobil 1 full syn was the best to use. on those engines i have reaplced any part imaginable, i couple of common problems early on were the VST having issues, oil pumps, few S/C's. the lower units are pretty solid on a light boat.
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