1995-1998 Mercury 40 50 HP Big Foot 4 Stroke Lower Unit Gearcase
Will only fit 4 Cylinder 4 Stroke Big Foot 40 & 50 HP from 1994-1998
This is a good working lower unit. The oil was clean when drained and passed the pressure test (15 psi for 20 minutes).
The driveshaft has 13 splines and is about 23 7/16" (from the top of the gear housing to the end of the driveshaft).
The prop shaft has 15 splines.
Shifts smoothly and stays in gear as it should.
Water pump was not inspected but we suggest replacing impeller before use.
You will need to re-fill with new gear oil prior to use.