Advance MB125 Marine Gearbox The Advance MB125 series gearbox has the functions of deceleration, reverse and forward clutch, and withstands propeller thrust. This series of gearboxes are mechanically controlled and feature small size and light weight. Marine Gearbox Model Advance MB125 Input Speed 1500-3000 Reduction Ratio(i) 2.03   2.46 Trans Capacity(KW/RPM) …