I like Yamahas and I prefer 4 strokes. I have a Yamaha 115 four stroke, and I love it. But in my opinion a 90 hp 4 stroke is the most perfect size for any fishing boat that is rated for that much or more. Little less weight with the 90, very smooth running, all the power you need. I would definatly go with the Yamaha 90 4 stroke.