18-7159 O-Rings for Mercury/Mariner Outboards, 5-Pack
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Sierra Marine engine parts are designed to meet or exceed the OEM part they are intended to replace and they are backed by the SeaStar Solutions Two-Year Warranty—one of the best in the business.
We offer a variety of O-rings, oil seals and seal kits for most engine applications on the water today—including MerCruiser, OMC, Johnson/Evinrude, Volvo and more.
How to find the O-ring you need
Many of the O-rings we offer fit multiple applications. Notice in the list below that in addition to Mercury Marine and OMC applications, there are a variety of other engine applications for the O-rings offered here. O-rings can also be selected by inside diameter and width, which also appear in the table.
The Sierra Engine Parts Selector
If you do not see the O-ring (or other engine part) you need, please visit the Sierra Engine Parts Selector, where you can search by engine make, model, serial number or year of manufacture.
| Sierra # | Application | Replaces OEM Part # | I.D. | Width | Qty. | Model |
|---|---|---|---|---|---|---|
| 18-7159 | GLM | 83440 | 3.855" | 0.210" | 5 | 6368799 |
| 18-7159 | Mallory | 9-76544 | 3.855" | 0.210" | 5 | 6368799 |
| 18-7159 | Mercruiser Stern Drive | 25-48451, 25-31534 | 3.855" | 0.210" | 5 | 6368799 |
| 18-7159 | Mercury Marine | 25-31534 | 3.855" | 0.210" | 5 | 6368799 |
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