YS Parts No.OEM Parts No.Fit for EngineSize and SpecificationCategory
YS18-115518-1155Sierra 18-1155 Ball BearingSierra 18-1155 Ball Bearing

Fits IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One & Gen II

Interchangeable with:

GLM
21620
Mallory
9-75114
Mercruiser Stern Drive
30-35914
30-17927
30-88957A1
30-88957
30-88957T
Mercury Marine
30-88957T
30-88957
30-88957A1
30-17927
30-35914
Mercury Race Outboard
30-35914
30-88957A1
30-88957
30-88957T
MERCRUISER LOWER GEAR HOUSING BEARINGS
YS18-115018-1150Sierra 18-1150 Needle Roller BearingSierra 18-1150 Mercruiser Needle Roller Bearing

Sierra 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
MERCRUISER LOWER GEAR HOUSING BEARINGS

MERCRU~1 by Marine Parts China on Scribd