I've got a 2008 Ranger 621VS with a 2010 Evinrude 250HO. It came with a Cyclone 4 Blade 21 Pitch Prop. Over the weekend with a full load, probably an additional 450 to 475 lbs over normal (2 extra pasengers) I could only pull 5000 RPM's and about 52 mph. I guess what I'm asking is, is this the best prop for my boat or should I be looking at something else.  Even running my normal load, 2 people and full gear my hole shot is terrible.  Once on plane the boat grabs and accelerates well.