Sierra Marine Parts Catalog: Mercruiser
Figure
Figure
#
Description
Part #
O.E.M. #
Qty.
#
Description
Part #
O.E.M. #
Qty.
Gearcase 50-75 HP 3 Cyl 1979-2003
48
Shift Spool Assembly
818349A1
1
1
Gear Housing
18-2415 1623-815822A36
1
49
Shim Kit
15-47397A1
1
2
Sleeve
--
23-816573
1
50 & 51 Forward Gear, outer Bearing
31-35928A1
1
3
Coupling
816597A1
1
52
retaining Clip, Inner Bearing
NSS
--
1
4
o-rings
25-21836
2
53
Forward Gear, Inner Bearing
31-30895
1
5
Face Seal
26-816575A2
1
54
Forward Gear
18-2206
43-828072A2
1
6
Screw, 10-32 X 5/8
NSS
10-806290
4
55
Cross pin Spring
24-30893
1
7
Star Washer
NSS
13-69432
4
56
Sliding Clutch
52-824112
1
8
Water pump Body
817275A1
1
57
Cross pin
17-30632
1
9
Impeller
47-43026-2
1
58
propeller Shaft
44-824110
1
10
Gasket
27-817277
1
59
Spacer
--
23-824108
1
11
Face plate
817276
1
60
reverse Gear
18-2206
43-828072A2
1
12
Gasket
27-43033-1
1
61
Thrust ring
681001
1
13
Seal Carrier
821759A2
1
62
Ball Bearing
30-88957A1
1
14
o-ring
25-90011
1
63
o-ring
25-31534
1
15
Seal
26-16977
1
64
roller Bearing
31-30956
1
16
Seal
26-89238
1
65
Bearing Carrier
818763A10
1
17
Cover Nut
824519
1
66
Seal
26-14077
1
18 & 19 Bearing, Upper Driveshaft
67
Seal
26-12224
1
(1.50-1.65 ratio)
31-36387A1
1
68
Carrier Anode
806105A1
1
Bearing, Upper Driveshaft
69
Lockwasher, Anode Mounting
--
13-69432
2
(1.47-1.62 ratio)
31-33138A1
1
70
Bolt, Anode Mounting
--
10-806290
2
20
Shim Kit
15-42637A1
1
71
Tab Washer
14-18323
1
21
Drive Shaft (1:47 & 1:62)
45-853648
1
72
Cover Nut
79448
1
Drive Shaft (1:50 & 1:65)
45-816919
1
73
Thrust Hub
13171
1
Drive Shaft (1:84 & 1:98)
74
Continuity Washer
NSS
13-42351-1
1
(early Style use with 18-1143)
--
45-816472
1
75
Splined Washer
12-31211A2
1
22
Impeller Drive Key
28-43037
1
76
Tab Washer
14-31210
1
23
Shift Shaft
815919A1
1
77
propeller Nut
11-52707
1
24
Sleeve
23-67370
1
Seal Kit (Not pictured)
26-816575A3
1
25
Seal
26-89236
1
26
Shift rod Bushing Assembly
23-815921A21
1
27
Screw, 10-32 X 5/8
NSS
10-806290
2
28
Star Washer
NSS
13-69432
2
29
Speedometer pickup Fitting
--
NSS
1
30
o-ring
25-36318
1
31
o-ring
25-36318
1
32
retaining ring
53-29641
1
33
Dowel pin
--
17-43044
1
34
Stud, Mounting
--
16-57984
1
35
Seal
26-45577
1
36
Dowel pin
--
17-43044
1
37
plug
22-67892A1
1
38
Gasket
12-19183
1
39
Trim Tab
76214A5
1
40
Washer, Anode Mounting
--
13-806210
1
41
Bolt, Anode Mounting
--
10-806327
1
42
pinion Bearing
31-42647A1
1
43
pinion Gear
18-2206
43-828072A2
1
44
Washer
12-92721
1
45
Nut
11-35921
1
46
pin
--
17-37972-1
1
47
Shift Crank
76865
1
707
NSS Not Sold Seperate