680 Stern Drive
Analysis Form
Every application is analyzed and approved by Konrad Application Engineers. Please complete the Analysis Form and submit it online, or download the PDF to print, scan, email, or mail back to Konrad. A Konrad Application Engineer will contact you to discuss your priorities and goals and determine the best Konrad sterndrive model for you. You can also reach out to us anytime. We look forward to working with you!
Technical Information
For your convenience, we have downloadable documents that will help with the conversion process.
- 600 Series Installation Guide
- 600 Series Maintenance Manual
The Konrad 680 has been engineered with the largest and strongest gears in the industry. The 680 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 80 offers
- Oversized bearings
Thicker walled casings
- One piece propeller shaft
- Continuous oil circulation for cool operation
- No corrosive exhaust through drive
- Precision machined super alloy gears
- No failure-prone cone clutch
- Minimal maintenance required
Package Options
Standard Equipment (Supplied with Sterndrive)
- Complete sterndrive assembly
- Inner and outer transom assembly
- Trim gauge and Trim pump assembly
- Oil reservoir with low level sensor for use in hull
- Drive comes full of sterndrive lubricant
- Two quarts of power trim fluid
Additional Equipment Required (Not supplied but available for purchase from Konrad)
- Transmission
- Propeller
- Steering package
- Drive shafts/transmission tail piece
- Bellhousing adapter
- Flywheel coupling
- Transmission oil cooler
- Alignment tool
Options for Individual Applications (Available for purchase from Konrad)
- Dual Helm kits
- Isolator Mounts
- Installation tool kit
- Extension kits
- Tie bars
- Stand off boxes
- Technical engineering assistance
Material / Manufacturing Specifications
Bearings
Taper roller bearings, spaced for optimum load carrying capabilities, support the shafts
Castings
Manufactured from high strength, heat treated aluminum
Gears
High strength heat treated alloy steel utilizing high performance marine technology
Shafts
Manufactured from high alloy, heat treated steel
U-Joint
Industry leading size for increased load carrying capacity and extended life
Installation / Operational Specifications
Application
Recreational or Commercial
Engine Connection
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, sixteen quarts with external reservoir
Propeller
Diameter Range - 17.25 in - 20 in (43.8 cm - 51 cm)
Rotation
Operates in either right or left hand rotation
Steering Angle
56° 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)
Approximate 30° of total lift range
Water Pickup
None through the sterndrive