18-3863 Head Gasket for Mercury/Mariner Outboard Motors
Clearance offer reflects an additional 50% off the lowest price for in-store pick up only.
Replacement head gaskets for your Mercury or Mariner outboard.
For 50 years Sierra has been producing parts engineered to meet or exceed the specifications of marine engine manufacturers and has gained the confidence of engine manufacturers and boat builders to a point of supplying them with OEM parts. Boaters and technicians can be assured a Sierra part will fit right the first time and restore function to OEM specifications.
The Sierra Engine Parts Selector
In addition to exhaust manifolds, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see our Engine Parts Selector, where you can search by engine make, serial number and model or year of manufacture.
Mercury Outboard Head Gasket Selection Chart
| SIERRA# | Applications | Interchange | Model |
|---|---|---|---|
| 18-3863 | Mercury Model 150 | GLM 35880; Mallory 9-63855; Mercury Marine 27-96542-1, 27-96281T01, 27-96542, 27-96281, 27-965422 | 1763143 |
