# 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

## Details

- **Price:** 87.7 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 87.70 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/27864549a02-mercury-mercruiser-864549a02-gasket-elbow-block-off-dry-joint-genuine-quicksilver-oem-part)
> Updated: 2026-07-25