Shift shaft seal and bushing kit for the Sierra 18-2622 Bell Housing. Mercruiser part 23-805041A2 gets replaced. It replaces the shift shaft seal on vintage Mercruiser 1, R, MR, and Alpha-I engines. Standard on some Generation II models up to serial number OF094774 and early Mercuiser Alpha-I models. To prevent water from getting into the shift cable and universal joint bellows, which can ruin the u-joints and gimbal bearing. The Mercruiser models are compatible with the Sierra 18-2622 Bell Housing Bushing Kit: 23-805041A2, 23-79373A1, 23-45588, GLM 87561, Mallory 9-72161, and Sierra 18-2622. All Sierra products are equal to or better than the original equipment parts they are meant to replace. Key Features: Kit for a bell housing bushing. Meets or surpasses the quality of the original equipment. It is designed to fit drives with serial numbers 0F094774 and lower from Mercruiser MC-I, R, MR, Alpha I, and Alpha Gen II. One kit is included per package. Interchangeable with Mercruiser Stern Drive 23-45588, 23-79373, 23-79373A1, and 23-805041A2, as well as Mallory 9-72161, GLM 87561. Product Details: SKU: 18-2622 UPC: 030999975584 Weight: 0.19 LBS Unit Of Measure: EA Fits: MC-I, R, MR, Alpha One & Gen II (s/n 0F094774 & Below)