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

🚤 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

🔄 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

📦 Condition

• Genuine Quicksilver part
• Brand new
• Supplied in original or equivalent packaging