Jeff I have a 21' Sylvan offshore with the I/O 3.0 litre.. I love fishing out of this boat not only is it trailerable anywhere, very economical on fuel, and it rides the waves really nice... I had a 19' Islander with a 4.3 litre in and that was a nice boat also.. I like the I/O beacuse you do not have to worry about netting around the outboard, that in my opinion is a pan in the butt... The extra 2 feet makes a huge difference in the back of the boat my 19 was tight trying to fight fish and net.... My 21 has plenty of room in the back to do all of that...... Dale