I've seen a few threads on the Mercury 383 MPI replacement engine and I though I'd pass along some real world data.

A buddy of mine just installed the 383 MPI in his 1989 25' Mach 1. The boat originally had a 330 454 and ran 52 mph. Our first trip out it ran a solid 58 right at the max rpm of 5200 with a beat up old 21 Quicksilver prop. I'm sure she'll hit 60 with a better prop.

Also, the boat now sits 4" higher out of the water. The 383 is a great option for a tired old 454.

Kurt

I just put one in my 1973 Donzi X-18 that we are restoring. We are expecting 70+ My mechanic has done a few of these with good results. A heck of a deal for the engine, transom assembly and drive. Turn key and runs on 87.

I just got one, got a few odds and ends to finish on installation.

I'd been on the water, but had to go to Raleigh NC on an emergency business trip

Thanks for the info! That's real good to hear, because I can't wait till I get my 233 in the water with two of those

I am putting one in a 24 foot Cigarette next month. Hoping for something about 60.