Mercury Part Number 1643-4931A9

Related part numbers 4814A10 and 1643-6038A17

This sale is for one new in the box Quicksilver short shaft lower unit gear case housing for Mercury outboard boat motors.

This is a new old stock original Mercury Quicksilver part not aftermarket.

There may be some shelf wear/scratches in the paint from sitting so long in storage, but other than that it is unused and in perfect condition.

Driveshaft measures 18" from base of water pump to tip of driveshaft and 18 1/2" to the top of the preload pin.

Prop Shaft 13 Spline
Driveshaft 11 Spline

This lower unit gear case housing fits some short shaft Mercury outboards from 1971-1977 with 40 and 50 hp.

Please check your part numbers to ensure a proper fit for your application.


Feel Free To Ask Questions.

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Upper Dual Rack adam