TRS coupler # 57758A2
#2
If its the coupler that connects to the transmission, i have two used ones with about 260ish hours on them. Had to buy different ones for my new drives so planned on selling these along with a bunch of other parts once i got around to it.
#3
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the input of the coupler is connected to the Borg Warner 72C gearbox output shaft with 24 splines and diameter 1 9/16 inch,
the output of the coupler is connected to the TRS input shaft with 17 splines and diameter 1 1/8 inch (see attachment).
It sits inside the Mercruiser tailstock # 98322A2
the output of the coupler is connected to the TRS input shaft with 17 splines and diameter 1 1/8 inch (see attachment).
It sits inside the Mercruiser tailstock # 98322A2



