Last june I bought a 16ft grizzly made by tracker, wish I would have bought thwe tunnel hullm but didn't.I opted for a merc 40HP 4 stroke. My old 17.5 fisher deep vee had a two stroke, was comfortable, but even though I was skeptical, this new four stroke is fantastic on gas. The only problem with the rig, is the trailer, which isn,t that good for shallow ramps.Think about a 40 or even a 25 merc four stroke.