The Mercury V10 400hp & V12 600hp Verado outboard engines are a couple of the most popular upgrades chosen by new Back Cove and MJM owners. The V12 engines are being offered on the Back Cove 390 and MJM 4 and the V10 engines are offered on the Back Cove 340. These new engines are the most innovative in their class. They are 30-45% quieter, get 20% better fuel economy and have a 15% faster cruising speed. See the performance data sheets below. For more details, contact one of our brokers.