how much power do I needed?

[WillyC]

Fishtale,
I just checked the yamaha website and the 200 hp is only 27 more pounds than the 150 (453lbs to 426lbs). This is for the 2005 engines. If you go to their website and click the performance bulletins they give a good preformance review of most of their motors tested on a whole bunch of different boats, no seacrafts but some comparable sized boats. I'm in the same boat as you (literally) except I have no motor now. I'm thinking early next year I will be looking to purchase a new one. I'm going either with the yamaha (2-stroker) 150 or 200. If the price difference isn't that great then it will probably be the 200. Good luck -Will

fishtale, I also sent you a p.m.