Sierra Marine Parts Catalog
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I/O—MERCRUISER-I/I-R/MR/ALPHAONEDriveShaftHousingComponents(Typical)
Figure
#
Description
Part #
O.E.M. #
Qty.
1
Upper Gear Housing
N/A
1547-9412A18
1
2
Screw, Top Cover
10-98794
4
3
Top Cover
94998A2
1
4
O-Ring, Top Cover
25-32546
1
5
Shim, Bearing Cup to Top Cover
15-45691A1
1
6
Tapered Roller Bearing
31-61100A1
1
7
Upper Drive Shaft
45-55796
1
8
O-Ring, Upper Drive Shaft
25-55801
1
9./10.
Upper Unit Gear Set
1.5:1
43-18410A2, 46-18411A2
1
Rebuild Kit
43-803116T1
1
1.65:1
43-45814A5
1
Rebuild Kit
43-803112T1
1
1.84:1
43-75325A3
1
Rebuild Kit
43-803114T1
1
1.98:1
43-55778A3
1
Rebuild Kit
43-803101T1
1
11
Tampered Roller Bearing
31-35990A1
1
12
Shim Kit, Bearing Cup to Drive Shaft Housing
15-36178A1
1
13
Oil Seal, Upper Drive Shaft Housing
26-32511
1
14
Oil Seal, Lower Drive Shaft Housing
26-96503
1
15
Vent Screw
10-79953A2
1
16
Gasket, Gear Housing Drain Screw
12-19183, 12-20260
1
17
Plug,Trim Tab Hole
19-47579
1
18
Stud, Drive Shaft Housing
N/A
16-56295
2
19
Bushing, Drive Shaft Housing
23-32632
1
20
Nut, Gear Housing Stud
18-2362
11-13439-1
3
21
Welch Plug, Drive Shaft Housing
(7/8” OD)
19-32652
1
(1 1/4” OD)
19-42682
1
22
Pipe Plug, Water Pocket
22-428611
1
23
Nut, Drive Gear to U-Joint
11-22339
1
24
Washer, Drive Gear to U-Joint Nut
12-45810
1
25
Shim Kit Drive Gear
15-35980A1
1
26
Bearing Kit
31-35988A2, A12
1
27
Spacer (comes with kit)
31-35988A2, A13
1
28
Roller Bearing (comes with kit)
31-35988A2, A13
1
29
Oil Seal
26-64893
1
30
Carrier Assembly Oil Seal
66081A2
1
31
O-Ring
25-70937
1
32
Ring, Roller Bearing Retainer
35983
1
33
Reataining Nut Drive Shaft Housing
816811-1
1
34
Yoke Assembly
46020T
1
35
Heavy Duty U-Joint
75832A2
1
36
Center Socket
39383T
1
37
U-Joint Shaft Coupler
59830A1
1
38
Drive Shaft
59830A5
1
39
O-Ring
25-25439
2
40
Screw, Water Pocket Cover to Drive Shaft Housing
10-28668
4
41
Gasket, Water Pocket Cover
27-55810
1
42
Water Pocket Cover (Sold as Assembly includes 40-44)
42724A3
1
43
Bushing, Water Pump Housing
26-38970
1
44
Water Tube
32-54236
1
AR
As required