Alpha one Short Yoke 18-2125
SIERRA 18-2125 SHORT YOKE, MERCRUISER #1 AND ALPHA UNITS. Fits all #1/Alpha units from s/n # 1684188 thru OK999999. Located and connected to the drive gear of the Upper Driveshaft Housing.
Replaces Mercruiser 46020T, Mallory 9-72400