Mercury Part Number
1648-5559A2
Casting Number
1648-5560M
This sale is for one brand new old stock short shaft Mercury Outboard lower unit.
This Mercury gear case is brand new in the box. This is an original factory Mercury part, not aftermarket.
The drive shaft measures approx 18 1/2" from the tip to the top of the case.
The driveshaft has 6 splines and the prop shaft has 7 splines.
This lower unit fits some Mercury outboards from 1977-1980 with 4 hp Gnat 2
Feel Free To Ask Questions.
We offer the most used Stern Drive & Outboard parts in Wisconsin!
adam 520B