I have a TR19 with an Evinrude 150 HO on it with a raker 22 pitch prop. It turns 6000 rpm wot. When I'm out guiding and happen to have two extra big guys in the boat (275+each) full tank of gas I have a hard time getting on plane. I would like to put a 4 blade prop on to make it easier. Not interested in top speed. Would I keep the same pitch or go down 1 or 2 ??? Thanks