My wife has a new Robalo R180 with a Yamaha 115. We use it primarily for knee boarding, tubing, etc. Most of the time when pulling I'm running around 3200-3400 RPM and the stern is really squatting and the bow pointed at the sun.
I know a four blade will cost me a little on the top end, but I seldom run WOT so speed is not a factor. The prop it came with gives 30MPH @5000 and that's what Yamaha says it should do with my boat.
Just wondering if a four blade would give the stern some lift at the slower speeds.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115
Bitter Gun Owner