The Konrad PRSIII is the best alternative for the aging MERCRUISER Speedmaster III series* drives.  It has greatly simplified the conversion process of the SSMIII, with just a few easy steps.  Most conversions can be completed in a matter of just a few hours. The Konrad PRSIII is delivered as a complete kit including all necessary components to complete the installation in a trouble free manner.  

*SSMIII is a product of Mercury Marine, a Brunswick company. The name is used for reference purposes only.

The Konrad 520 Stern Drive is designed and engineered for people that play hard and work hard. Whether you want to relax and cruise all day or if your living depends on your stern drive, the 520 is for people who need Durability, Dependability and Performance.

The Konrad 540 Stern Drive is manufactured in two variations, the Standard 540 and the High Performance 540. It is lighter and faster. It will enhance the performance of both diesel and gasoline powered craft. Standoff boxes with external steering complement selective applications.

Konrad 540 PRS

The Konrad 540 PRS has proven to be a fantastic alternative for the obsolete MERCRUISER TRS Sterndrive system. The 540 PRS package is a direct bolt-on replacement for the aging TRS with no hull modifications necessary. With hundreds of successful conversions on the water, it has proven to handle greater power levels with unparalleled durability and performance. Most conversions can be completed within a days work.

Konrad Ace Stern Drive

The Konrad Ace is designed to provide performance boaters with a complete propulsion system for offshore vessels designed with maximum cockpit space in mind. The Konrad Ace houses the BAM 1350 heavy duty transmission inside its extension box and is delivered complete with duel ram external hydraulic steering cylinders. Capable of exceeding the demands of the high-performance market, the Ace features state-of-the-art engineering and highest quality components.