Volvo Penta SX-M Lower Gear Unit 1.66 / 1.97 Ratio Single Prop 3855493

Volvo Penta SX-M 1.66 / 1.97 Ratio Lower Gear Unit Single Propeller. Pressure and vaccum tested after new seals installed. Good bearings and gears. Shafts are straight. In great working condition ready to bolt on and fill with oil. This unit has the vertical shaft retainer O ring in the lower unit. With the fixed mount water tube receiver. Will fit the block seal style lower as well. Will not work properly if you big oil seals O ring is supposed to be in the upper geat unit. Double check or ask.