sunrunner0706
Recruit
- Joined
- Jul 10, 2007
- Messages
- 2
My objective is to properly size a 4-blade prop on a 19' 1983 sunrunner (runabout) with a 470 merc. cruiser engine for better pulling power for wakeboarding (for the kids) and lower speed planing (for the wife). The boat currently operates around 4600 rpm at 40 mph with a 19 pitch three blade propeller. I believe I understand the general trade off's between the 3 and 4 blade propellers, however, I do not understand what this boat should be operating at WOT with either a three or four blade prop. Any advise would be appreciated, Thanks
