MTU 8V 2000

I am helping a friend search for a used boat. He is currently looking at a 2008 65' yacht with MTU 8V 2000 series M94 engines. I am very familiar with the Series 60 850HP MTU, but not at all with the newer 1200 HP M94 engine. Any information, good or bad, would be greatly appreciated.

Greg

The boat will be in the Seattle area for quite sometime. Authorized MTU shop nearby

Thanks for your response. The sequential twin turbos and complex engine electronics to make everything function are what concern me. But, like I said, I have no real world experience with this particular set up.

I stand corrected. These are 8V2000 M93 engines rated at 1200 hp. They have approximately 775 hours and are the original engines in a 2008 Marquis 65. Currently waiting for results from mechanical survey. The mechanic was monitoring engine readings as we ran through the rpm range and all reading were within factory specs. They ran well during sea trial and and reached the max rpm giving us 27 knots at WOT. The only objective concern I can offer is excessive smoke upon cold start and when running up rpm range with "no load". I'm talking smoke like "I can't see the dock". Not black smoke. Mechanic did not seem to have a clear answer as to cause and will continue to investigate. I have heard reports of a spotty reliability record but I do not know that for a fact.

I am keeping an open mind and am reaching out to anyone with good or bad experience with this brand and model engine.

I also used the words mechanical survey. They're an authorized MTU shop in Seattle Lab report on oil samples was normal in all categories. The smoke issue has repeated after both cold starts conducted one week apart. After each start, the boat was operated for over an hour at various loads up to WOT.

The mechanic is very experienced and the shop has a solid reputation. They do mechanical surveys all over the NW on MTU diesels. The mechanic could not find an obvious cause.

All data from the engines has been downloaded and will be analyzed. They will continue exam until cause is found and a determination made as to whether this is normal.

Glad your M94s are working out. These are M93s and apparently a different animal all together.

I am hoping someone that has this same motor, or experience with it, comments.

You are correct. I misread your post. I do not know if there are any significant differences in in the amount of smoke from 10V 2000s and 8V 2000s. To me, it seems excessive but I'll wait for final report from MTU shop.

I agree with you. My concern is not just the huge cloud upon startup but the amount after running boat to normal operating temp.

Thanks for the comment

Bamboo

Thank you for the reply. The no load full RPM test was after 10-15 min warm up at dock at increased idle. Serious smoke. As the engines warmed and we reached open water to test under load, there was more of what I would describe as a sligh haze or fog from the exhaust.

We removed both air filters from each motor to examine turbos. All blades nice and clean. No evidence of oil or soot.

Additionally, all turbos were creating boost within specs

They both smoked although port more than starboard. Prior to the first cold start and no load rpm test I witnessed, the boat had just been brought down from B.C. to Seattle. I was not part of the crew so I don't know how (rpm-load) she was run. The vessel sat for about 10 days before the first start up I saw. You could very well be right as far as running her hard for awhile. In the area where the boat is now temporarily moored, you spend about 30 mins running at near idle because of no wake zones before shutting down.