Mercruiser Lower Gearcase Assembly Exploded View Diagram and Parts
Fits Generation II
| Figure # |
Description |
O.E.M. # |
Sierra # |
| 1 |
Gear Housing |
1623-815822A30 |
|
| 2 |
Sleeve |
23-816573 |
|
| 3 |
Coupling |
816597A1 |
18-3151 |
| 4 |
O-Rings |
25-21836 |
18-7420 |
| 5 |
Face Seal |
26-816575A2 |
18-2599 |
| 5A |
Screw, 10-32 X 5/8 |
10-806290 |
NSS |
| 5B |
Star Washer |
13-69432 |
NSS |
| 6 |
Water Pump Body |
817275A1 |
18-3147** |
| 7 |
Impeller |
47-43026-2 |
18-3056 |
| 8 |
Gasket |
27-817277 |
18-2563 |
| 9 |
Face Plate |
817276 |
18-3122 |
| 10 |
Gasket |
27-43033-1 |
18-2564 |
| 11 |
Seal Carrier |
821759A2/
807929A 1 |
18-2354
|
| 12 |
O-Rings |
25-90011 |
18-7174
|
| 13 |
Seal |
26-16977 |
18-2013 |
| 14 |
Seal |
26-89238 |
18-2014 |
| 15 |
Cover Nut |
824519 |
18-2346 |
| 16 & 17 |
Bearing, Upper Driveshaft (1.50-1.65 Ratio) |
31-36387A 1 |
18-1143 |
| 16 & 17 |
Bearing, Upper Driveshaft (1:47-1:62 Ratio) |
31-33138A 1 |
18-1193 |
| 18 |
Shim(s) |
15-42637A 1 |
18-2294
|
| 19 |
Drive Shaft (1:47-1:62 Ratio) |
45-853648 |
18-2331
SPECIAL
ORDER
815.726.4400 |
| 19 |
Drive Shaft (1.50-1.65 Ratio) |
45-816919 |
18-2261 |
| 19 |
Drive Shaft (1.84-1.98 Ratio) |
45-816472 |
|
| 20 |
Impeller Drive Key |
28-43037 |
18-3293 |
| 21 |
Shift Shaft |
815919A1 |
18-2320 |
| 22 |
Speedometer Pickup Fitting^ |
NSS |
|
| 23 |
Sleeve |
23-67370 |
|
| 24 |
Seal |
26-89236 |
18-2009 |
| 25 |
Shift Rod Bushing Assembly |
23-815921A21 |
18-2353 |
| 26 |
O-Rings |
25-36318 |
18-7440 |
| 27 |
Retaining Ring |
53-29641 |
18-4295 |
| 28 |
Dowel Pin |
17-43044 |
|
| 29 |
Seal |
26-45577 |
18-2944 |
| 30 |
Gasket |
12-19183 |
18-2945 |
| 31 |
Plug |
22-67892A1 |
18-2375 |
| 32 |
Pin |
17-37972-1 |
|
| 33 |
Pinion Bearing |
31-42647A1 |
18-1117 |
| 34 |
Pinion Gear |
43-828072A2 |
SET ONLY |
| 35 |
Washer |
12-92721 |
|
| 36 |
Nut |
11-35921 |
18-3719 |
| 37 |
Shift Crank |
76865 |
18-2130 |
| 38 |
Shift Spool Assembly |
818349A1 |
18-2286 |
| 38A |
38A.Cotter Pin & Sleeve |
NSS |
1 |
| 39 |
Retainer |
NSS |
1 |
| 40 |
Washers |
NSS |
1 |
| 41 |
Spring |
NSS |
1 |
| 42 |
Shift Spool |
NSS |
1 |
| 43 |
Clutch Shaft |
NSS |
1 |
| 44 |
Shim(S) |
15-47397A1 |
18-2285 |
| 45 & 46 |
Set, Cone & Race |
31-35928T 1 |
18-1159 |
| 47 |
Forward Gear, Inner Bearing |
31-30895 |
18-1157 |
| 47A |
47A.Retaining Clip, Inner Bearing |
|
NSS |
| 48 |
Forward Gear NON STOCKED SEP
|
43-828072A2 |
|
| 49 |
Cross Pin Spring |
24-30893 |
18-2348 |
| 50 |
Cross Pin |
17-30632 |
18-2357 |
| 51 |
Sliding Clutch |
52-824112 |
18-2202 |
| 52 |
Propeller Shaft |
44-824110 |
18-2166 |
| 53 |
Reverse Gear nss
|
43-828072A2 |
NSS
|
| 54 |
Thrust Ring |
681001 |
18-2342
SPEC
ORDER
815.726.4400 |
| 55 |
Ball Bearing |
30-88957A1 |
18-1155 |
| 56 |
O-Ring |
25-31534 |
18-7159
|
| 57 |
Roller Bearing |
31-30956 |
18-1158 |
| 58 |
Bearing Carrier |
818763A10 |
18-2376
|
| 59 |
Seal |
26-14077 |
18-2002 |
| 60 |
Seal |
26-12224 |
18-2076 |
| 61 |
Tab Washer |
14-18323 |
18-2298
|
| 62 |
Cover Nut |
79448
8M2011027 |
18-3751
|
| 63 |
Thrust Hub |
13171 |
18-4220 |
| 64 |
Continuity Washer |
13-42351-1 |
NSS |
| 65 |
Splined Washer |
12-31211A2 |
18-3714
|
| 66 |
Tab Washer |
14-31210 |
18-3200 |
| 67 |
Propeller Nut |
11-52707 |
18-3700 |
| 68 |
Carrier Anode |
806105A1 |
18-6093 |
| |
Seal Kit (Not Pictured) |
26-816575A3 |
18-2646-1 |
