27864549A02 Mercury MerCruiser 864549A02 Gasket Elbow Block Off Dry Joint | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Dry-Joint Exhaust Elbow Block-Off Gasket - Part Number: 27-864549A02

A genuine Quicksilver block-off gasket for MerCruiser GM V6 and V8 dry-joint exhaust manifold, spacer and elbow assemblies.

The closed gasket blocks cooling-water transfer through the elbow joint in cooling-system configurations where water is routed externally rather than through the manifold-to-elbow passages.

⚙️ Key Features

• Genuine Quicksilver OEM dry-joint gasket

• Correct Mercury part number 27-864549A02

• Closed / block-off cooling-passage design

• Used on 4.3L, 5.0L, 5.7L and 6.2L dry-joint exhaust systems

• Sierra, Barr, Recmar and aftermarket replacements available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 27-864549A02 → Supersedes 27-864549A1

• 27-864549A1 earlier OEM block-off gasket reference

• 864549 original OEM gasket-family reference

OEM / Related Numbers:

• 27-864549A02

• 864549A02

• 27864549A02

• 27-864549A1

• 864549A1

• 864549

Aftermarket / Verified Equivalents:

• Sierra: 18-0720

• Barr Marine: MC47-27-864549

• Recmar: REC27-864549A02

• Marine Petrol Parts: WA27-864549A02

• BTS: BTS-27-864549A02

🚤 Compatibility

Commonly used on:

• MerCruiser dry-joint exhaust manifolds, spacers, risers and elbows

• Block-off cooling configurations

Typically suits:

• Engine models:

• MerCruiser 4.3L V6 dry-joint exhaust - approximately 2002 onward

• MerCruiser 4.3L MPI Alpha and Bravo

• MerCruiser 5.0L V8 dry-joint exhaust - approximately 2002 onward

• MerCruiser 5.0L MPI Alpha and Bravo

• MerCruiser 5.7L / 350 MAG dry-joint exhaust

• MerCruiser 350 MAG MPI Alpha and Bravo

• MerCruiser 6.2L / 377 MAG MPI dry-joint exhaust

• MerCruiser closed-cooling systems requiring the block-off gasket

• Dry-joint spacer and riser installations requiring the closed water-passage configuration

• Engine Type: MerCruiser GM 4.3L V6 and 5.0L, 5.7L and 6.2L V8

• System Type: Dry-joint exhaust elbow / riser block-off gasket

• Year Range: Approximately 2002 onward, dependent on cooling-system configuration

🔌 Function

The gasket seals the dry exhaust joint while blocking the internal cooling-water passages required to remain closed in the applicable cooling configuration.

Common signs of failure:

• Exhaust or water leakage at the elbow joint

• Rust staining around the dry-joint flange

• Cooling water entering the exhaust passage

• Gasket delaminated or burned

• Replacement required during elbow, riser or spacer removal

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging