I have a Powertech 4 blade, 15" & 15 pitch, Powertect PN ELE4R15PMS275 (FLO-TORQ II hub design). It's on my 23 DVCC (2002) with a 225 HP 4 stroke Yamaha. Big difference getting on a plane over the 3 bladed Yamaha. Let me know if you're interested and we can privately chat. Not sure what boat...