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Sierra Marine Parts Catalog: Mercruiser

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Figure
Figure
#
Description
Part #
O.E.M. #
Qty.
#
Description
Part #
O.E.M. #
Qty.
Gearcase 50-75 HP 3 Cyl 1979-2003
44
pinion Bearing
18-1117
31-42647A1
1
1
Gear Housing
18-2401
1623-8951A37
1
45
Lower Alpha Gear Set (pinion gear)
18-2206
43-17064A2,
2
Water Tube Guide
18-3109
23-29804
1
43-17064A3,
3
Bushing/Water pump Housing
18-3110
26-38970
1
43-42934
1
4
o-ring, Upper Drive Shaft
18-7158
25-30613
1
46
Anti-Galling Washer pinion Gear
18-2343
22-92721
1
5
Slinger
18-7426
25-30271
1
47
pinion Nut
18-3719
11-35921
1
6
Stainless Steel Locknuts (5/16-24)
N/A
11-13436
1
48
Shift Crank
18-2130
76865
1
Stainless Steel Locknuts (1/4-28)
N/A
11-13438
2
49
Shift Spool Assembly
18-2286
818349A1
1
7
Washer
18-4270
12-36001
3
50
Shim Kit, Forward Gear
18-2285
15-47397A1
1
8
Screw, Water pump Body to
51
Tapered roller Bearing Set
18-1159
31-35928A1
1
Water pump Base
N/A
10-96411
1
52
Inner Bearing. Forward Gear
18-1157
31-30895
1
9
Upper pump Housing
18-3116
46-96148A1
1
53
retaining Clip, Inner Bearing
N/A
--
1
10
Insert Cup
18-3114
48752
1
54
18-1157
31-30895
1
11
Impeller
18-3017
47-89984
1
55
Lower Alpha Gear Set
43-17064A2,
12
Gasket, Upper Water pump
(Forward Gear/pinion)
18-2206
43-17064A3,
to Wear plate
18-2915
27-85609-1
1
43-42934
1
13
Impeller plate
18-3117
32435
1
56
Spring, retainer - Cross pin
18-2348
24-30893
1
14
Gasket, Wear plate to Water
57
Sliding Clutch
18-2202
52-66063
1
pump Base
18-2914
27-85608-1
1
58
Cross pin, Clutch to Actuating Shaft
18-2357
24-30893
1
15
Water pump Base
18-3420
46-44292A3
1
59
propeller Shaft
18-2166
44-66060,
16
oil Seal (upper)
18-2013
26-16977
1
44-6606-3
1
17
oil Seal (lower)
18-2014
26-89238
1
60
Spacer, reverse Gear
N/A
23-824108
1
18
o-ring, Water pump
18-7176
25-90011
1
61
Lower Alpha Gear Set
43-17064A2,
19
Gasket, Water pump Base to
(reverse Gea-NSS)
18-2206
43-17064A3,
Gear Housing
18-2919
27-42631-1
1
43-42934
1
20
retainer, Drive Shaft Bearing
18-2346
824519
1
62
Thrust ring, Bearing Carrier
18-2342
68100-1
1
21
Tapered roller Bearing Drive Shaft
18-1143
31-36387A1
1
63
Ball Bearing
18-1155
30-88957A1
1
22
Shim Kit, Lower Drive Shaft Bearing
18-2294
15-42637A1
1
64
o-ring, Bearing Carrier
18-7159
25-31534
1
23
Drive Shaft
18-2180
45-42634
1
65
Needle roller Bearing
18-1158
31-30956
1
24
Drive Key Water pump Impeller
N/A
28-56654
1
66
Bearing Carrier
18-2191
73020A-14
1
25
Shift Shaft Washer
18-4267
12-29395
1
67
oil Seals, Bearing Carrier
18-2002
26-76868
2
26
Washer rubber Shift Shaft Bushing
18-2340
12-31266
1
68
Tab Washer
18-2298
14-18323
1
27
Shift Bushing
18-2154
23-30617A2
1
69
Spanner Nut
18-3751
79448
1
28
o-ring, Shift Shaft Bushing
18-7153
25-25439
1
70
Thrust Washer
18-4220
13171, 77987
1
29
Washer, Lower Shift Shaft
NSS
12-27880
1
71
Continuity Washer
N/A
13-423511
1
30
retaining Clip, Shift Shaft
NSS
53-29641
1
72
Brass Castle Washer
18-3714
12-31211A2
1
31
Stainless Steel Shift Shaft
18-2150
77481-1
1
73
Tab Washer
18-3200
14-31210,
32
oil passage Seal
18-2944
26-45577
1
14-816629
1
33
Dowel pin, Gear Housing to Drive
74
prop Nut
18-3700
11-52707
1
Shaft Housing
18-3226
10-30720
2
34
Screw, Gear Housing to Drive
Shaft Housing
18-2361
10-30206
1
35
Nut, Gear Housing to Drive
Shaft Housing
18-2362
11-13439-1
2
36
Gasket, Gear Housing Drain Screw
18-2945
12-19183,
12-20260
1
37
plug, oil Fill/Drain
18-2244
10-79953A2
1
38
Insert, Water pick (Stbd)
18-3199
93423-1
1
39
Insert, Water pick (port)
118-3198
93424-1
1
40
Screw, Insert to Gear Housing
18-3197
10-76156
1
41
Nut, Insert Screw
18-2344
11-45812
1
42
Trim Tab
18-6011
31640A1
1
43
Screw, Trim Tab Gear Housing
18-6245
10-32470
1
703
N/A
Not Available
NSS Not Sold Seperate