Sierra 18-1150 Mercruiser Needle Roller BearingSierra high-quality engine parts are designed to meet OEM specifications. Fits MC-I & R drives; Interchangeable with: GLM; 21600; Mercruiser Stern Drive; 31-92366A1; 31-92366; Application:Mercruiser Stern Drive Model: 120/140; 1978-1982; s/n 4893635 thru 6225576; Model: 165; 1978-1981; s/n 4890460 & up; Model: 228; 1978-1982; s/n 4898730 thru 6225576; Model: 260; 1978-1982; s/n 4898730 thru 6225576; Model: 470; 1978-1982; s/n 4893835 thru 6225576; Model: 485; 1980-1982; s/n 4893835 & up; Model: 898; 1978-1982; s/n 4898730 thru 6225576; Model: R/MR/Alpha One (Sterndrive); 1983-1991; 6225577 thru 0D469858; Model: R/MR/Alpha One (Transom Assembly); 1983-1991; s/n 6216687 thru 0D469858;