I saw your Boat @ Performance on Sunday. Jason and his son should be able to find the problem.

Those guys build/rig and race boats so I'd say your boat is in good hands.

Has your drive been discovered to be off center?

My boat handles great with the deep drive and the rev 4 prop. I think it would be faster with a shorty but thinking the money would be better spent on external ram steering.

Don't know yet. They were supposed to check it out yesterday. I'm waiting for them to call me back.

Performance tested it with their Imco -2" shorty and determined that was the fix. I drove it myself (before they ordered a new lower for me). Unfortunately, the day I tested the boat, Lake George had 3' + rollers and washing machine boat wakes, but I was able to determiner that with the shorty installed, I could raise the tabs above 50-55 without porpoising. The boat also turns much better.
I got the boat back last Friday with my new lower installed. I can now run wide open with no tabs and trimmed out. Johnny Saris put a good hour on the boat while they had it, and his evaluation is that the boat now performs as designed. He had the boat at 69 MPH (GPS) @4600 RPM's on a 91 degree high humidity day, The best I've seen so far is 68 (GPS), but my lake is 1700" feet higher than Lake George. Not sure how accurate the Livorsi (non-GPS) speedometer was (can't hook it up with the IMCO), but the most I saw with that was 65 MPH on a cooler day, so I got a nice bump in top end......No doubt the boat will run 70 mph closer to sea level, or on a cool day.
I have to say though........Trimmed out, with the tabs all the way up, the boat is a handful in any kind of rough water (unless going into the wind), or boat wakes as It wants to get airborne every chance it gets. I found that I can run 65 mph with just a touch of tab, and the boat is much more stable, and less likely to go airborne in rough conditions.
I'm still running the Bravo 1 25P, so I'm thinking that a prop that plants the stern in the water more, might be a better choice.
OBTW, they measured a 502 that resides in the area. The prop was an 1 5/8 higher than mine (before installing the IMCO)

Is your bride back in the boat with you now?

Congrats now go enjoy it.

Ken

Great news. A lot of us run Imco -2s on these boats.

Great news!
It sounds like the newer boats with wider spread strakes like and may need the shorty or higher X.
You may want to revisit testing a few different props. alternatively, you could have the B1 labbed for more bow lift rather than stern lift so you don't have to trim as high for max speed.

I still have the Turbo 1 25P that I purchased. Going to try that out this weekend. With the Bravo 1 lower unit, it had waaaay too much bow lift. Maybe with the IMCO it'll be more reasonable. With it trimmed out, you couldn't see over the bow!!

My same experience with Turbo 1's on small boats. Scary !

My experiences with props on my 22 Donzi has been quite different or maybe I just like a different ride. Order I'd rank props that I've tried on my 96 22C- Merc Rev 4, Turbo 1, Mirage, Bravo... The Rev 4 is by far my favorite...