Counter-rotating propeller sterndrive 680

The Konrad Model 680 Stern Drive is engineered with the largest, strongest gears in the sterndrive industry. Konrad's 680 gives you efficient carrying capacities up to 7.7 metric tons (17,000 lbs.) per drive. The 680 outdrive operates with extreme efficiency in the 40 knot (46 mph) range and sports dual 20 inch, counter rotating propellers. The Model 680 is the largest and strongest commercially rated stern drive available on the market today.