MERC #1-R GEAR CASE

Sierra

mercruiser #1-r gear housing components exploded view
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Mercruiser Gear  Housing Components Exploded View Diagram and Parts
Fits #1-R
Figure # Description O.E.M. # Sierra #
1 Lower Gear Housing 18-2402
2 Water Tube Guide 23-29804 18-3109
3 Bushing/Water Pump Housing 26-38970 18-3110 *
4 O-Ring, Upper - Drive Shaft 25-30613 18-7158 *
5 Slinger 25-30271
18-7426
6 Stainless Steel Locknuts (1) (5/16 -24) 11-45592 18-3723
7 Stainless Steel Locknuts (2) (1/4 -28) 11-20361, 11-35888 Spec order
18-3722

8 Washer 12-36001 Spec order
18-4270

9 Screw 10-30720 18-3226
10 Washer, Water Pump Body N/A
11 Upper Pump Housing 46-96148A1 18-3116
12 Insert Cup 48752 Spec Order
18-3114

13 Impeller 47-89984 18-3017
14 Drive Key N/A
15 Gasket, Upper Water Pump to Wear Plate (upper) 27-85609-1
Spec order
18-2915*
16 Impeller Plate 32435
18-3117
Spec order
17 Gasket, Upper Water Pump to Wear Plate (lower) 27-85608-1 Spec order
18-2914 *
18 Dowel Pin 17-35973 Spec order
18-3227
19 Water Pump Base 46-57234A1 18-3417
20 Oil Seal (upper) 26-16977 18-2026*
21 Oil Seal (lower) 26-89238 18-2014*
22 O-Ring 25-90011 Spec Order
18-7176
*
23 Gasket, Water Pump Base to Gear Housing 27-85610-1 18-2826 *
24 Spring N/A
25 Tapered Roller Bearing 31-53079A1 18-1164
26 Shim (s), Drive Shaft Bearing 15-57007A 18-2295
27 Drive Shaft 45-41939F 1 55-1803
18-2167
28 Insert, Water Pickup N/A
29 Screw, Insert to Gear Housing spec order
10-76156
spec order
18-3197
30 Nut, Insert Screw 11-45812
18-2344
spec order
31 Screw, Trim Tab to Gear Housing Gear Housing N/A
32 Dowel Pin, Gear Housing to Drive Shaft Housing N/A
33 Stud, Water Pump to Gear Housing (3 - 1/4") N/A
34 Stud, Gear Housing to Drive Shaft Housing (1 - 31/32) N/A
35 Stud, Water Pump to Gear Housing (3 - 3/8") N/A
36 Stud, Gear Housing to N/A
37 Oil Passage Seal 26-45577
spec order
18-2944*
38 Plug, Oil Fill/Drain 10-79953A2 18-2244
39 Gasket, Gear Housing Drain Screw 12-19183, 12-20260 18-2945 *
40 Nut (2) Gear Housing to Drive Shaft Housing N/A
41 Screw, Gear Housing to Drive Shaft Housing 10-30206 18-2361
42 Trim Tab 31640A1 18-6011
43 Needle Roller Bearing 31-92366A1 18-1150
44 Lower Unit Gear Set (pinion gear) 23-96084A4 18-2200
45 Pinion Nut 11-35921 18-3719
46 Shift Shaft Washer 12-29395 18-4267
47 Washer, Rubber Shift Shaft Bushing 12-31266 18-2340
48 Oil Seal 26-89236 18-2009*
49 Shift Bushing 23-30617A2 18-2154*
50 O-Ring 25-25439 18-7153*
51 Washer, Lower Shift Shaft Bushing N/A
52 Retaining Clip, Shift Shaft 53-29641 18-4295
53 Stainless Steel Shift Shaft 77481-1 18-2150
54 Cotter Pin, w/Shift Spool Assembly 19755A 18-2196
55 Sleeve, w/Shift Spool Assembly 19755A 18-2196
56 Retainer Spring, w/Shift Spool Assembly 19755A 18-2196
57 Washers, w/Shift Spool Assembly 19755A 18-2196
58 Spring, w/Shift Spool Assembly 19755A 18-2196
59 Spool, w/Shift Spool Assembly 19755A 18-2196
60 Shift Crank 76865 18-2130
61 Shaft, w/Shift Spool Assembly 19755A4 18-2196
62 Shim, Forward Gear Bearing 15-47397A1 18-2285
63 Tapered Roller Bearing 31-35928A1 18-1159
64 Needle Roller Bearing 31-30895 18-1157
65 Lower Unit Gear Set (forward) 23-96084A4 18-2200
66 Spring, Retainer, Cross Pin 24-30893 18-2348
67 Sliding Clutch 52-853594T   18-2202
68 Cross Pin, Clutch to Clutch Actuating Shaft 18-2348
69 Propeller Shaft 44-66060, 44-66060-3 18-2166
70 Shim (s) Thrust Ring to Gear Housing 15-31535A1 18-2284
71 Lower Unit Gear Set (reverse) 43-96084A4 18-2200
72 Thrust Ring, Bearing Carrier 35915 SPEC
ORDER
18-3759

73 Ball Bearing 30-88957A1 18-1155
74 O-Ring 25-31534 18-7159
75 Needle Roller Bearing 31-30956 18-1158
76 Bearing Carrier Assembly 73020A14 18-2191
77 Key, Locating - Bearing Carrier N/A
78 Oil Seals 26-76868 18-2002
79 Tab Washer 14-79447 18-2299
80 Spanner Nut 79448 18-3751
81 Thrust Washer 13171, 77987 18-4220
82 Continuity Washer N/A
83 Brass Castle Washer 12-31211A2 18-3714
84 Tab Washer 14-31210, 14-816629 18-3200
85 Prop Nut 11-52707 18-3700
* Included in Seal Kit 26-33144A 2Not Pictured)
N/A Not Available
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