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The Konrad Model 620 Stern Drive is considered the “workhorse” of the 600 Series fleet.
This drive is engineered with the largest, strongest gears in the commercial, diesel sterndrive industry.
Konrad’s model 620 is an extremely reliable, robust drive.
Combining Konrad’s proven single 20 inch (51 cm) propeller technology with stronger shafts and gears, the 620 has set a new standard for stern drive durability.
| Application | Engine Coupling |
Engine Type |
Gear Ratios |
Propeller | Rotation | Steering Angle |
Transmission | Water Pickup |
| Commercial | Protection Multiple anodes, all castings chromatized and layered with powder coatings. | Diesel/Petrol | 1.23:1, 1.45:1, 1.55:1, and 1.78:1 | 20″ | Right/Left | 56o range | Reversing transmission required | None |
The Konrad Model 660 Stern Drive is a performance driven drive designed to meet your demand for speed.
The 660 outdrive is optimally designed for 7 – 15 meter (21 – 50 foot) vessels, with speeds up to 60 knots (70 mph).
The Model 660 is designed with dual, counter rotating propellers, and the largest and strongest gears available in the commercial, diesel sterndrive market, making it exceptionally strong as well as exceptionally fast.
| Application | Engine Coupling |
Engine Type |
Gear Ratios |
Propeller | Rotation | Steering Angle |
Transmission | Water Pickup |
| Commercial | Protection Multiple anodes, all castings chromatized and layered with powder coatings. | Diesel/Petrol | 1.07:1, 1.23:1, 1.31:1, 1.43:1, 1.50:1, and 1.74:1 | 20″ | Right/Left | 56orange | Reversing transmission required | None |
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.
| Application | Engine Coupling |
Engine Type |
Gear Ratios |
Propeller | Rotation | Steering Angle |
Transmission | Water Pickup |
| Commercial | Protection Multiple anodes, all castings chromatized and layered with powder coatings. | Diesel/Petrol | 1.24:1, 1.43:1, 1.52:1, and 1.74:1 | 20″ | Right/Left | 56orange | Reversing transmission required | None |