This excellent low-hours unit came off of a 2009 Mercury 250 ProXS L(20") DFI Optimax. V6 3.0L
It is a TorqueMaster ProXS with a 1.75:1 Ratio and the HD 1-1/4" Propshaft. Gen I.
It has been pressure tested and filled with Mercury HP Gear Lube and a new water pump impeller installed.
May fit other years and models of 20" Optimax Models as well.
This was part 8M0072952 which new... retails for over $11,000