Herrickjde
Member
- Jul 28, 2019
- 68
- Boat Info
- SeaRay 290 Sundancer 1998
- Engines
- 2 Mercruiser 5.7 350 EFI 310 HP - Drive - Alpha 1 / Gen 2
I have a 1998 290 with twin 4.3 mercrusiers as well. How fast does your boat run and at what RPM's ? I have stainless steel 4 blade props with 17 pitch on the boat now and it runs 24 to 25 mph at 4,000. That is it ? I tried a set of stainless steel 3 blade props with 15 pitch (came with the boat) and the 4 blade was much better and not difference in top end. I have been told that since my outdrives were replaced by the previous owner the gear ratio may have been changed on the Alpha 1 gen 2 drives as there are 4 different gear ratios available. I am trying to figure out what is normal for this boat with these engines. It is a bit hard to plane with 4 or 5 people on board. They need to move to the front until we plane. Yes I have the drives and trim tabs all the way down