Sierra Marine Parts Catalog
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BALL BEARING
Replaces: 30-88957A1, T
DRIVE BEARING KIT
Replaces: 31-35988A2, 31-35988A12
IA,IB,IC & EZ Shift
All
1964-66
1684188 - 2065186
120/140
1.98
1967
2062141- 2187468
120/140
1.98
1967-71
2187469 - 3134193
120/140
1.98
1971-82
3134194 - 6225576
470/485
1.84
1976-82
4208730 - 6225576
160
1.68
1967
2065190 - 2182197
160
1.68
1967-71
2182198 - 3134193
165
1.65
1971-81
3213658 - UP
888
1.5
1971-73
3106717 - 3134193
—
888
1.5
1973-77
3134194 - UP
225-S
1.5
1974
3856268 - 4200499
898/228
1.65
1977-82
4782330 - 6225576
233
1.32
1975-77
4200500 - UP
—
—
250
1.32
1977
4791300 - 4898729
—
—
255-TRS
All
1973-74
3377316 - 4203749
➂
—
260
1.5
1978-82
4898730 - 6225576
280-TRS
All
1975-76
4203750 - 4895399
➂
—
R/MR/Alpha One
1.98/1.84/
1.65/1.50
1984-90
6225577 - UP
➀ ➃
R/MR/Alpha One
1.5
1984-90
6225577 - UP
R/MR/Alpha One
1.32
1984-90
6225577 - UP
—
—
R/MR/Alpha One
1.5 Heavy
Duty
1984-90
6225577 - UP
—
Alpha One SS
1.32
1986-89
A545004 - UP
—
—
Alpha One SS
1.5
1986-89
A545004 - UP
—
Alpha One Gen II
2.40/1.98/
1.84/1.65
1991-95
D469859 - F679999
➃
Alpha One Gen II
1.5
1991-95
D469859 - F679999
Alpha One Gen II
2.40/1.94/
1.81/1.62
1996-97
F680000 - K999999
➃
Alpha One Gen II
1.47
1996-97
F680000 - K999999
Alpha One Gen II
2.40/2.00/
1.94/1.81/
1.62
1998 & Up
L100040 - UP
—
Alpha One Gen II
1.47
1998 & Up
L100040 - UP
—
II-TR
—
1973-76
3377316 - 4794899
➁
—
SSM II
—
1982-97
ALL
➂
—
TR/TRS
—
1977-93
4794900 - UP
➂
—
Bravo I, II, III
All
—
B664190 & UP
—
—
➀
Timken Cone # 89449 / Cup 89410
➁
Straight Shoulder Gear Only
➂
Bearing for U-Joint Yoke
➃
Use 18-1142 for 1.5:1 Upper Gear Ratio
Sterndrive
Drive Gear
Model
Drive Ratio
Years
Serial Number
(Yoke)
Driven Gear
Upper Cap
MERCRUISER STERNDRIVE UPPER GEAR HOUSING BEARINGS
I/O—MERCRUISER-DriveSystem