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Yes, I was the owner of Tabu from 2004-2009. I actually bought it for the purpose of putting the diesel in, and got it to run about 55 mph with it. I gave it up due to lack of intercooling capacity and realizing how much it would cost at that point to fix that.
I also got married at that point, and decided I wanted a reliable boat, and not a science project, so I had a 600hp 540 built, and I ran the boat for the 2005-2009 seasons, about 40 or so hours easy, no racing or poker runs. With the power and setup the boat had, it would go 75 mph in fresh water at 5150 rpm. Full of fuel and two people onboard, it would run about 72. The fastest I ever had it was 77 on GPS with low fuel.
There is a 25 lb weight plate bolted in the nose. If you put bigger power in the boat, and want to spend more time running 60 mph or better, you could take that out. If you want to cruise 50's, leave it in there.
The drive was gone through by Skip at MRD in early 2005, and received new seals, 1.33 upper gears, and (1.5 overall), and a new cardan joint. With the prop that is on it, you'd have really nice package with a 750 that would turn 5600 rpm or so. It should run deep in the 80's with that. Beyond that, you'd be looking to upgrade the drive probably. Transmission was built by Mike at Harbor Marine in Everett, WA.
Tullio
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