Konrad 620B Sterndrive

The Konrad 620B considered the workhorse of the fleet is a dependable, robust drive. By combining Konrad’s proven, single propeller technology with strong shafts and gears, the 620B has set a new standard for stern drive durability.

INTENDED FOR MILITARY, COMMERCIAL, MEDIUM DUTY, AND RECREATIONAL PERFORMANCE THE KONRAD 620B 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

Standard Equipment (Supplied with Sterndrive)

* Complete sterndrive assembly
* Inner and outer transom assembly
* Digital trim display 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
* Transom mounted; integrated trim and steering cylinders

Additional Equipment Required

* Transmission
* Propeller
* Steering package
* Drive shafts/transmission tail piece
* Bellhousing adapter
* Flywheel coupling
* Transmission oil cooler
* Alignment tool

Options for Individual Applications

* Dual Helm kits
* Isolator Mounts
* Installation tool kit
* Extension kits
* Tie bars
* Stand off boxes
* Technical engineering assistance

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

OPERATIONAL SPECIFICATIONS

Application
Recreational or Commercial

Engine Connection
Direct or Remote (Jack or CV Shaft)

Exhaust
None through the sterndrive

Gear Ratios

1.27:1
1.45:1
1.55:1
1.78:1
1.98:1

Lubrication
Full Immersion, seventeen quarts with external reservoir

Propeller
Diameter Range – 17.25 in – 20 in (43.8 cm – 51 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