"Ideal" power for a 20' '87 Superfisherman?

[billythekid]

IF YOU ARE GOING 4 STROKE THE 140 SUZUKI IS THE MOST POWER TO WEIGHT RATIO. I had the same delema couple of months ago. I could have had a 130 honda for a great price but it weighs 140 pounds more that the suzuki samething with the yamaha is 100 pounds heavier for less horsepower. you have to remember as others said the boat was built for a 310 LB outboard motor. The one thing I like about the 4stroke is no oiltank to be mounted and in the way.