Counter-rotating propeller sterndrive 680B

The Konrad 680B has been engineered with the largest and strongest gears in the industry. The 680B is capable of carrying capacities up to 8.4 metric tons (over 18,500 lbs.) per drive. This drive operates with extreme efficiency in the area of 40 konts (46 mph): INTENDED FOR MILITARY, COMMERCIAL, MEDIUM DUTY, AND RECREATIONAL PERFORMANCE THE KONRAD 680B OFFERS Oversized bearings Thicker walled casings Dual, counter rotating propeller Continuous oil circulation for cool operation No corrosive exhaust through drive Precision machined super alloy gears No failure-prone cone clutch Minimal maintenance required