New member with some questions

[Chiefsurfer]

Hey there guys. I bought a 1987 Wellcraft V20 last year. Boat came with a 1999 C150 yamaha(commercial), with what I believe is a 19" stainless prop. Great boat the few times i was able to get out on it, while trying to get all the work done I want.

When i went out last summer, I was getting ROUGHLY 40 mph, WOT, at only 5000 rpm. It's plenty of speed for me, as I can rarely actually take the conditions at that speed. I just know that the optimal fuel burn and performance is at reccomended WOT, which for this motor is 5000-5500. That was half tank of gas, lightly loaded. I am thinking I can maybe go to a 16" 4-blade, pick up the 300 rpm or so, and get a little faster plane.

Is 40 mph, at 5000 what you guys have found with a carb'd 150. People with yamaha's would be great, but realistically, if you guys are getting between 38 and 43, with your 150's at 5,000 rpm I think im in the range.

Oh, and glad to be here!!