PRM marine transmissions have established a world-wide reputation for quality, reliability and in-service performance, making them the ideal choice for pleasure, workboat and fishing vessel applications. All PRM hydraulically operated gearboxes feature a twin countershaft design, which enables full rated power to be transmitted in ahead or astern, with either left or right hand propellers. PRM80 and 120 are mechanically actuated with adjustment-free cone clutches. When correctly matched to engine and propeller, every PRM unit will provide trouble-free operation for many years. All parts are designed for maximum reliability over an extended service life. In addition, running gear components are carefully specified and machined to the highest quality standards to ensure quiet and smooth operation.