[GradySailfish]

Hi and welcome to the site. Please tell us more about your 20, is it a Superfish or Master Angler...what year is it...what are other plans? Will ube doing the work yourself?

I may catch some flak for this, but I'd shy away from a big four stroke on that boat. 20 SC's are stern heavy boats so its advisable for you to try and minimize the weight on the stern. A Suzi 4 Stroke is a great motor but personally I've been looking at the 150 HP series Evinrude ETEC's. They're getting outstanding reviews. When I'm ready I'll buy a 150 ETEC for my 20 MA project boat.