450rdawg
New Member
- May 9, 2021
- 21
- Boat Info
- 330 Sundancer 1995
- Engines
- Twin 454 Mercruiser V-drive
I have a 95 Sundancer that I purchased as a project. It came with the Hurth 1.56:1 tranny and they both needed replacing. I couldn’t find 2 of the same ratio that were in my budget so I had to go with two 2.0:1 transmissions. The props on the boat are 17x16. I never drove the boat before so I don’t know what the performance was with the existing props. I also put two remanufactured 7.4 engines in it. I’ve been through about 12 hours of break in at lower RPM’s. I took it out a couple of weeks ago to stretch her legs a bit. I can’t get it to come up on plane and the engines won’t rev above 2400. I’m completely lost when it comes to transmission ratios and their relation to prop size/pitch. That being said, I think my props are either too big and/or need to be below a 16 pitch. I’m just looking for some good advice on what to do to remedy my situation. As always, thanks in advance for your suggestions!