Assembly Guide
User Manual
680B STERN DRIVE
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 knots (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
| Application | Recreational or Commercial |
| Recreational or Commercial | Direct or Remote (Jack or CV Shaft) |
| Exhaust | None through the sterndrive |
| Gear Ratios | 1.24:1, 1.43:1, 1.52:1, 1.74:1, 1.94:1 |
| Lubrication | Full Immersion, seventeen quarts with external reservoir |
| Propeller | Diameter Range – 15 in – 18.5 in (38 cm – 47 cm) |
| Rotation | Counter rotation |
| Steering Angle | 50° range |
| Transmission | Reversing transmission required |
| Transom Mounting | Template available per application |
| Transom Requirements | 13° angle nominal, 6.4 mm – 79.4 mm (1/4 in – 3 1/8 in) thick |
| Trim/Lift System | Approximate -6° to +10° trim, twin cylinders with electrohydraulic pump Approximate 30° of total lift range |
| Water Pickup | None through the sterndrive |
