Sierra Manifold End Cap Gasket 18-0928-1-9, Replaces 27-73814, Fits MerCruiser MCM/MIE 120-260 (Pack of 2)

The Sierra Manifold End Cap Gasket, part number 18-0928-1-9, seals the end cap on MerCruiser exhaust manifolds to prevent exhaust and coolant leaks at the manifold-to-end-cap joint. It is made of graphite-infused stainless steel for superior compressibility, letting it conform to mating surfaces and hold a reliable seal under the heat and vibration of engine operation. Each gasket is sold in a pack of two so both end caps on an engine can be replaced together during a manifold service or gasket refresh. This gasket is a direct replacement for OEM part 27-73814, giving MerCruiser owners a straightforward way to source the correct seal without hunting down the original part. It fits MerCruiser MCM/MIE 120 (2.5L), 140 (3.0L), and 165 inline 6-cylinder engines, as well as MCM/MIE 470, 898, 228, and 260 engines. Backed by Sierra's industry-leading warranty, it is a precision-made component intended for straightforward removal-and-replace installation during routine exhaust manifold maintenance.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0928-1-9
• Package Quantity: Pack of 2
• Material: Graphite-infused stainless steel
• Weight: 0.04 pounds
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Package Dimensions: 7.01 x 6.97 x 0.31 inches
• UPC: 808282369187
• Application: Mercruiser exhaust manifolds

Fitment

• MerCruiser MCM/MIE 120 (2.5L)
• MerCruiser MCM/MIE 140 (3.0L)
• MerCruiser MCM/MIE 165 (inline 6-cylinder)
• MerCruiser MCM/MIE 470
• MerCruiser MCM/MIE 898
• MerCruiser MCM/MIE 228
• MerCruiser MCM/MIE 260

Replaces (OEM)

• 27-73814

Frequently Asked Questions

What does the Sierra 18-0928-1-9 gasket fit? This gasket fits MerCruiser MCM/MIE 120 (2.5L), 140 (3.0L), and 165 inline 6-cylinder engines, along with MCM/MIE 470, 898, 228, and 260 engines.

What OEM part number does 18-0928-1-9 replace? It is a direct replacement for OEM part 27-73814, the manifold end cap gasket used on the fitted MerCruiser engines.

How many gaskets come in a package? Sierra 18-0928-1-9 is sold in a pack of two gaskets, enough to service both end caps on a single engine.

What material is the Sierra manifold end cap gasket made from? The gasket is made of graphite-infused stainless steel, chosen for its compressibility and ability to hold a seal under engine heat and vibration.

How much does this gasket weigh? The Sierra 18-0928-1-9 manifold end cap gasket weighs 0.04 pounds.

What are the dimensions of the gasket? Each individual gasket measures 0.39 x 0.39 x 0.39 inches, and the retail package measures 7.01 x 6.97 x 0.31 inches.

Is this a genuine Sierra part or an aftermarket copy? 18-0928-1-9 is a genuine Sierra part, backed by Sierra's industry-leading warranty.

Where is this gasket used on the engine? It seals the joint between the exhaust manifold and the manifold end cap on the fitted MerCruiser engines, preventing exhaust and coolant leaks at that connection.

Can I install this gasket myself? Yes, the Sierra 18-0928-1-9 manifold end cap gasket is designed as a direct removal-and-replace part for routine exhaust manifold service.

What is included when I order this part? Ordering 18-0928-1-9 gets you two manifold end cap gaskets, matching the OEM 27-73814 specification.