27-84264M – Cover Gasket – Mercury / MerCruiser (Old Stock)

The 27-84264M Mercury gasket is a genuine OEM cover seal originally made for Mercury and MerCruiser marine engines. This gasket fits between engine cover components to stop water, oil, and fuel from leaking. It also helps keep dirt and contaminants out of sensitive engine parts. Many boats need this gasket replaced during maintenance, and having the right one helps avoid future service issues.

You will often find this part number on older Mercury and MerCruiser fuel pump or carburetor cover assemblies. Although some listings show the newer superseding number 27-84264 for this gasket, the “M” version remains an original factory part. Either way, it performs the same sealing job required in your engine setup.

When you install the 27-84264M Mercury gasket, make sure surfaces are clean and free of old gasket material. Then, align the part, tighten fasteners to the correct torque, and verify that the seal sits flush. Doing these steps helps prolong the life of your engine components and reduces the chance of leaks later. Reliable seals matter, especially in marine environments where vibration, saltwater, and heat can speed up wear.

Shop at Arizona Outboard Dismantlers to keep your outboard running strong and ready for the water. We focus on providing parts that help you maintain your marine engine with confidence.