2746820 Mercury MerCruiser MerCruiser exhaust manifold gasket | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver GM V8 Big Block Exhaust Manifold Gasket - Part Number: 27-46820

A genuine Quicksilver exhaust manifold to cylinder head gasket for MerCruiser GM big block V8 petrol engines. This gasket is used on 7.4L, 8.1L, 8.2L, 454 CID, 496 CID, 502 CID and selected high-performance MerCruiser big block applications where the manifold diagram specifies 27-46820.

⚙️ Key Features

• Genuine Quicksilver OEM exhaust manifold gasket

• Correct Mercury part number 27-46820

• Used on GM big block MerCruiser V8 engines

• Cross-references with 27-46820A1 and 46820 references

• Also crosses to OMC, Volvo Penta, Crusader, Barr, GLM and Sierra gasket references

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 27-46820 current OEM service reference

• 27-46820A1 related packaged / earlier service reference

OEM / Related Numbers:

• 27-46820

• 46820

• 2746820

• 27-46820A1

• 46820A1

Aftermarket / Verified Equivalents:

• Sierra: 18-0418

• GLM: 33760

• Barr Marine: MC47-27-46820

• Barr Marine: CHVA470000

• Fel-Pro: 17440

• Crusader: 96653

• OMC: 0508878

• OMC: 0778127

• OMC: 0909613

• OMC: 3852472

• Volvo Penta: 3852472

• Osco: CW-GH

• Recmar: REC27-46820

🚤 Compatibility

Commonly used on:

• MerCruiser GM big block V8 exhaust manifold to cylinder head gasket applications

• MerCruiser 7.4L, 8.1L, 8.2L, 454 CID, 496 CID and 502 CID engines where specified

Typically suits:

• Engine models:

• MerCruiser 325 GM 427 V8 - 1969-1972, serial 2278747 to 3640670

• MerCruiser 325 GM 427 V8 - 1972, serial 3640671 to 3780449

• MerCruiser 330 GM 454 V8 - 1977-1981, serial 4623115 to 6083144

• MerCruiser 330 GM 454 V8 - 1982-1987, serial 6083145 to 0B816540

• MerCruiser 390 GM V8 - 1969-1970, serial 2781129 to 2825059

• MerCruiser 420 GM V8 - 1987-1989, serial 0A398941 to 0B622418

• MerCruiser 425 GM 454 V8 - 1990-1992, serial 0B622419 to 0D725499

• MerCruiser 465 GM V8 - 1990-1992, serial 0C849992 to 0D725646

• MerCruiser 7.4L MIE W/Borg Warner GM 454 V8 - 1988-1992, serial 0B788366 to 0D715493

• MerCruiser 7.4L Bravo GM 454 V8 - 1988-1991, serial 0B771113 to 0D603117

• MerCruiser 7.4L Bravo Gen V GM 454 V8 - 1992-1996, serial 0D603118 to 0F800699

• MerCruiser 7.4L Bravo Gen VI GM 454 V8 - 1996-1997, serial 0F800700 to 0K999999

• MerCruiser 7.4L Bravo MPI Gen VI GM 454 V8 - 1998-2000, serial 0L010003 to 0M024330

• MerCruiser 7.4L EFI MIE GM 454 V8 - 1996-1997, serial 0F874815 to 0K999999

• MerCruiser 7.4L MIE LH Gen V GM 454 V8 - 1992-1996, serial 0D715494 to 0F820141

• MerCruiser 7.4L MIE with Hurth GM 454 V8 - 1989-1992, serial 0C391564 to 0D715493

• MerCruiser 7.4L MIE LH Gen VI GM 454 V8 - 1996-1997, serial 0F820142 to 0K999999

• MerCruiser 502 MAG MPI Bravo Gen VI GM 502 V8 - serial 0L085433 to 0M024999

• MerCruiser 502 MAG / 8.2L big block applications where 27-46820 is specified

• MerCruiser 520 - serial 0M970122 and up

• MerCruiser 525 SC Gen VI - serial 0F745260 to 0F877734

• MerCruiser 525 SC Gen VI - serial 0K000012 to 0L415623

• MerCruiser 525 SC Gen V GM 454 V8 - 1996, serial 0F615814 to 0F745215

• MerCruiser 540 Stroker 4V - serial 1G400000 to 1G499999

• MerCruiser 600 SC Gen IV / V GM 502 V8 - 1991-1996, serial 0D456489 to 0F877642

• MerCruiser 500 Bulldog 540 CID V8 - 1990-1995, serial 0C577254 to 0F348987

• MerCruiser 500 Bulldog 540 CID V8 - 1996-2001, serial 0F615762 to 0M050281

• MerCruiser 575 540 CID V8 - 1986-1992, serial 0A677429 to 0D763716

• Volvo Penta / OMC GM big block applications using equivalent gasket 3852472 where specified by their own catalogues

• Engine Type: MerCruiser GM big block V8 petrol sterndrive and inboard

• CID / Litre Range: 427, 454, 496, 502 and 540 CID / 7.0L, 7.4L, 8.1L, 8.2L and related big block applications

• System Type: Exhaust manifold to cylinder head gasket

🔌 Function

The gasket seals the exhaust manifold to the cylinder head, preventing exhaust gas leakage and maintaining correct exhaust routing away from the engine.

Common signs of failure:

• Exhaust ticking or manifold leak

• Soot marks around manifold ports

• Exhaust fumes in engine compartment

• Rust staining at the gasket edge

• Gasket replacement required during manifold removal

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging