| Sierra Item # | OE/Competitor # | Quantity | Description | Image | Comments |
| 18-2002 | Chrysler/Force/US Marine
GLM
Honda Outboard
Johnson/Evinrude Outboard
Mallory
Mercruiser Stern Drive
Mercury Marine
- 26-30550
- 26-70019
- 26-73838
- 26-76868
OMC Stern Drive
| 2 | Oil Seal |  | N/A |
| 18-2007 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
Mercury Sport Jet
| 1 | Oil Seal |  | N/A |
| 18-2009 | GLM
Mallory
Mercruiser Stern Drive
- 26-31249
- 26-46021
- 26-89236
- 26-892361
Mercury Marine
| 1 | Oil Seal |  | N/A |
| 18-2013 | GLM
Mallory
Mercruiser Stern Drive
- 26-16977
- 26-31507
- 26-79884
- 802276
Mercury Marine
- 26-16977
- 26-20465
- 26-31507
- 26-79884
- 802276
| 1 | Oil Seal |  | N/A |
| 18-2014 | Chrysler/Force/US Marine
GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
| 1 | Oil Seal |  | N/A |
| 18-2048 | GLM
Mallory
Mercury Marine
| 1 | Oil Seal |  | N/A |
| 18-2050 | Mallory
Mercury Marine
| 1 | Oil Seal |  | N/A |
| 18-2053 | Chrysler/Force/US Marine
GLM
Honda Outboard
Mallory
Mercury Marine
| 1 | Oil Seal |  | N/A |
| 18-2801 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
| 1 | Water Pump Gasket |  | N/A |
| 18-2826 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
- 27-33146
- 27-85610
- 27-856101
| 1 | Water Pump Base Gasket |  | N/A |
| 18-2914 | GLM
Mallory
Mercruiser Stern Drive
- 27-32433
- 27-856081
- 27-8M0090319
Mercury Marine
- 27-30603
- 27-32433
- 27-85608
- 27-856081
- 27-8M0090319
| 1 | Water Pump Gasket |  | N/A |
| 18-2915 | GLM
Mallory
Mercruiser Stern Drive
- 27-32434
- 27-856091
- 27-858524
Mercury Marine
- 27-30604
- 27-32434
- 27-85609
- 27-856091
- 27-858524
| 1 | Water Pump Gasket |  | N/A |
| 18-2945 | Chrysler/Force/US Marine
Johnson/Evinrude Outboard
Mallory
Mercruiser Stern Drive
- 12-19183
- 12-191832
- 12-191833
- 12-19183B
- 12-20260
- 12-20260B
Mercury Marine
- 12-19183
- 12-191832
- 12-191833
- 12-20260
| 2 | Drain Screw Gasket |  | N/A |
| 18-2948 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
- 12-49221
- 12-492211
- 27-23245
Mercury Sport Jet
| 1 | Rubber Washer |  | N/A |
| 18-3110 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
- 26-29677
- 26-36557A1
- 26-38970
| 1 | Water Pump Housing Bushing |  | N/A |
| 18-7153 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
Mercury Race Outboard
Mercury Race Sterndrive
OMC Stern Drive
Volvo Penta
| 1 | O-Ring |  | N/A |
| 18-7157 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
| 1 | O-Ring |  | N/A |
| 18-7158 | GLM
Johnson/Evinrude Outboard
Mallory
Mercruiser Stern Drive
Mercury Marine
OMC Stern Drive
| 1 | O-Ring |  | N/A |
| 18-7159 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
| 1 | O-Ring |  | N/A |
| 18-7161 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
| 1 | O-Ring |  | N/A |
| 18-7162 | Chrysler/Force/US Marine
GLM
Johnson/Evinrude Outboard
Mallory
Mercruiser Stern Drive
Mercury Marine
Mercury Sport Jet
OMC Stern Drive
Sears
Volvo Penta
| 1 | O-Ring |  | N/A |
| 18-7173 | Chrysler/Force/US Marine
GLM
Johnson/Evinrude Outboard
Mallory
Mercruiser Stern Drive
Mercury Marine
- 25-27018
- 25-30224
- 25-30224Q
OMC Stern Drive
| 1 | O-Ring |  | N/A |
| 18-7426 | GLM
Mallory
Mercruiser Stern Drive
Mercury Marine
Mercury Sport Jet
| 1 | O-Ring |  | N/A |
| 18 2316 | GLM
Mercruiser Stern Drive
Mercury Marine
| 1 | Washer | < href="/images/product/large/18-2316.JPG" data-title="18-2316 Washer"> | N/A |
| 18-2340 | GLM
Mercruiser Stern Drive
Mercury Marine
| 1 | Shift Shaft Washer |  | N/A |
| NSS | Mercury Marine
| 1 | Exhaust Seal | No Image | N/A |
