MTU 16V2000 M91 full rebuild; in vessel

My friend
Please don't take this as an argument, just a different point of view. AND this is O K.

When this guy purchased the big boat and her tender; in writing was the oil change and rebuild schedules on both.
Yes, it is a very large money game. Great differences between the big and little boats.

IMO; Investment was made at the boats purchase, Maintenance is everything there after.

Holy cow ! Look at all the 4”x4”s under the motor! Wow!
Heavy , heavy.

Here in my aqua - neighborhood the old DD mechanical motor mechanics have moved on to the heavens . ( you know the kind I mean the ones that could “feel” the engine and do the work in their sleep )
Wonder how much it is to pull one from the grave to do a on board rebuild on a in line 71 series? Ugh , priceless …

something that was once a dime a dozen has certainly changed over time.

Sadly, these kids can not spell 71 or recognize one if they were sitting one.
I envy them. Look at their hands,,, CLEAN.
They would not even open the valve cover on a 71. They know where the clean money is.

I'm getting tapped on for a re-build and I can not do it.
I'm making calls, Ole guys are retired and gone hunting.

If I only had 2 young, strong, mute and hungry backs that wanted to learn a good trade.

Looks like a complete engine removal for in shop rebuild is all that is available around Jax.
I'm going to spec cutting the hull open to get it out.

Yeah . Yeah ! That’s what I was thinking , in all of the photos. Clean hands , clean everything.
Are they that exceptional?

CR that’s the nationwide Detroit diesel story it’s the same all around seems to me. Insane to cut the hull out! What?

I do love my old J & T 471s, they keep on running along , but not to Bristol yacht standards for me.
Bottom line we are all fanatical about our boats on here.( even the captains, as it should be).
I’ve got the bread, but I sure am apprehensive on the very few that I have to choose from to do an overhaul on the engines.
Thinking it might just come down to me , and some help.
Checked into re-powering
$30k each for Cummins rebuilt / repower . Not installed. I forget the model number….350 Hp or so.
Got that $$ to but the boat is not worth it .

Anyway chin up as they say.

Torque multiplying wrenches. I have often wondered how they work.
I have sets of beam and clickers with 3/4" heads. Just give some safe room to pull or push.

Watching a skinny asp punk push one of these around and with no effort, was torquing down MAN heads. Kind of helped me feel older.
F M

Really, I was talking about the hull side.
Cut it open, reach in and grab the whole engine/clutch.
No interiors destroyed above the engine room.

stb hull side; A battery charger, some water lines and batteries with cables.
The air/box vents.

Going up still leaves no where to go, the back of the saloon has a single wide door/hatch.
Thought about going thru the saloon top also, more stuff in the way up there.

When Hatterass of Liquordale messed this boat up, they did a great job messing everything possible up.

The lesser of evils; out the side If I can not find some nimble ole-timers to in-frame it.

Very common on aluminum and steel vessels. Referred to as a WEP, (welded equipment penetration) Painting and fairing of the replaced WEP / blending the hull side panel patch and boot stripe is costly. Often times requiring the re-spray of the entire side of the vessel due to linier urethanes not blending well like an acrylic urethane would and the WEP being very noticeable topcoat wise. I've never encountered this on a fiberglass vessel and would think it difficult due to the extra glass reinforcements needed when glassing the panel back in.

Helped on a glass DeerFoot (SV Moonshadow)
Dark color hull.
You could not see where the hull was cut, Beautiful job.
Great boat and great owners.

I was planning to work on a houseboat Roamer with the same engine replacement (long,, long ago) plan but it never happened.