#Model-225l Color-Black. Mercury has invested countless hours into engineering the 175 to 225hp family of FourStroke outboards, so you don't have to give it a second thought. A 3.4L V6 powerhead delivers unmatched performance and reliability, while a vibration-dampening design ensures a quiet, comfortable boating experience. FourStroke outboards are easy to own, fun to drive and ready to explore.. Adaptive Speed Control. The Adaptive Speed Control feature lets you maintain engine rpm despite cha