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PRM 90 Gearbox

Simple mechanical operation, lightweight, compact & rugged

New for 2016, the PRM 90 replaces the PRM 80 gearbox.

The PRM 90 gearbox is designed for use in pleasure craft where a simple lightweight transmission is required.
The cone clutches for both ahead and astern are mechanically operated and require no adjustment.
The gearbox is purposely built to operate with standard rotation engines i.e. providing a clockwise rotation of the gearbox input shaft when viewed on input. In forward drive the output shaft rotates opposite to input shaft therefore requiring a right hand propeller.

Download: Installation Drawing | User Manual

Nominal Power Ratings, PRM 90 Gearbox

Model Ahead Ratio Pleasure Light Commercial
90D2 2.04:1 0.94 1.26 0.62 0.83
90D2.5 2.50:1 0.82 1.10 0.54 0.73
Max. Input Power 37 50 25 33

Maximum operating speeds : 5000 rev/min

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