# 8M0185794 Mercury MerCruiser Exhaust Manifold | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver V8 Dry Joint Exhaust Manifold - Part Number: 8M0185794

  

Genuine Quicksilver dry joint exhaust manifold for MerCruiser GM small-block V8 marine engines. This manifold replaces the dry joint centre-riser manifold used on 5.0L, 5.7L and 6.2L MerCruiser V8 applications and is commonly cross-referenced with 865735A02, 865049T01 and 864308T01.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM exhaust manifold

• Correct Mercury part number 8M0185794

• Dry joint V8 centre-riser manifold

• Used on MerCruiser 5.0L, 5.7L and 6.2L small-block V8 engines

• Direct replacement where 865735A02 / 865049T01 / 864308T01 manifold family is specified

• Used with matching dry joint riser gaskets and elbow hardware

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 8M0185794 current OEM service reference

• 865735A02 earlier related dry joint manifold reference

• 865049T01 earlier related manifold reference

• 864308T01 earlier related manifold reference

  

OEM / Related Numbers:

  

• 8M0185794

• 865735A02

• 865049T01

• 864308T01

• Dry joint exhaust manifold

• V8 dry joint manifold

• Small-block MerCruiser manifold

• 27-864850A02 related restricted elbow gasket

• 27-864547A02 related full-flow dry joint gasket family

• 27-864549A02 related closed dry joint gasket family

  

Aftermarket / Verified Equivalents:

  

• Barr Marine: MC-1-865735

• H2O Performance: T-20735

• Sierra: 18-1843 application family where matched

• GLM dry joint V8 manifold equivalents where matched

• Recmar / aftermarket dry joint V8 manifold replacements for 8M0185794 / 865735A02 applications

  

🚤 Compatibility

  

Commonly used on:

  

• MerCruiser V8 dry joint exhaust systems

• MerCruiser 5.0L, 5.7L and 6.2L petrol engines with centre-riser dry joint manifolds

• Alpha, Bravo, inboard and MPI dry joint V8 exhaust applications where specified

  

Typically suits:

  

• Engine models:

• MerCruiser 5.0L GM 305 V8 dry joint exhaust applications, 2002 and newer where specified

• MerCruiser 5.0L MPI Alpha / Bravo dry joint applications where specified

• MerCruiser 5.7L GM 350 V8 dry joint exhaust applications, 2002 and newer where specified

• MerCruiser 5.7L MPI Alpha / Bravo dry joint applications where specified

• MerCruiser 350 MAG MPI Alpha / Bravo dry joint applications where specified

• MerCruiser 350 MAG MPI Horizon dry joint applications where specified

• MerCruiser MX 6.2L MPI Bravo dry joint applications where specified

• MerCruiser MX 6.2L MPI Horizon Bravo dry joint applications where specified

• MerCruiser Scorpion / Black Scorpion V8 dry joint applications where specified

  

• Engine Type: MerCruiser GM small-block V8 petrol engine

• Engine Range: 5.0L, 5.7L and 6.2L where specified

• System Type: Water-jacketed exhaust manifold / dry joint exhaust

  

🔌 Function

  

The exhaust manifold collects exhaust gases from the cylinder head and routes them through a water-jacketed marine exhaust path to the riser or elbow.

  

Common signs of failure:

  

• Rust staining or water leakage around manifold

• Internal corrosion or restricted cooling passages

• Water intrusion into exhaust ports

• Exhaust leak at manifold flange

• Overheating or poor exhaust cooling

• Replacement required during exhaust system overhaul

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 886.1 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 886.10 AUD | In stock |

## Images

- 8M0185794 Mercury MerCruiser Exhaust Manifold | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/8m0185794-mercury-mercruiser-exhaust-manifold-genuine-quicksilver-oem-part)
> Updated: 2026-07-18