# 27-782461 Mercury MerCruiser Gasket Inner Exhaust Adapter | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Inner Exhaust Adapter / Megaphone Gasket - Part Number: 27-782461

  

Genuine Quicksilver inner exhaust adapter gasket used on Mercury and Mariner V6 outboards. This gasket seals the inner exhaust adapter / megaphone area on 2.0L and 2.5L V6 engines, commonly covering 135HP, 150HP, 175HP and 200HP applications where the driveshaft housing and exhaust tube diagram specifies 27-782461.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM inner exhaust adapter gasket

• Correct Mercury part number 27-782461

• Also referenced as 27-78246-1 and 27-78246

• Used on Mercury / Mariner V6 exhaust adapter assemblies

• Metal-reinforced style gasket application

• Direct replacement during powerhead, adapter plate or exhaust housing service

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 27-782461 current OEM inner exhaust adapter gasket reference

• 27-78246-1 formatted service reference

• 27-78246 earlier / short-form gasket reference

• 78246 short-form Mercury reference

  

OEM / Related Numbers:

  

• 27-782461

• 782461

• 27-78246-1

• 27-78246

• 78246

• Inner exhaust adapter gasket

• Megaphone gasket

• Exhaust adapter cover gasket

• Drive shaft housing gasket

• Exhaust tube gasket

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-0135

• GLM: 32880

• NAPA SME: 180135

• Aftermarket reference: 2190

• Aftermarket reference: 540-29

• Recmar / aftermarket inner exhaust adapter gasket equivalents for 27-782461

• Use the correct metal-reinforced gasket for V6 exhaust adapter service

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner V6 2.0L and 2.5L exhaust adapter assemblies

• Inner exhaust adapter / megaphone gasket service

• Powerhead removal and exhaust housing service

  

Typically suits:

  

• Engine models:

• Mercury V-135 2.0L / 2.5L V6 exhaust adapter applications where 27-782461 is specified

• Mercury V-150 2.0L / 2.5L V6 exhaust adapter applications where specified

• Mercury V-175 2.5L V6 exhaust adapter applications where specified

• Mercury V-200 2.5L V6 exhaust adapter applications where specified

• Mercury 135HP through 200HP 2.0L / 2.5L V6 outboards using inner exhaust adapter gasket 27-782461

• Mercury V-200 serial 0G303046 to 0G760299 drive shaft housing and exhaust tube applications where 27-782461 is listed

• Mariner 135HP, 150HP, 175HP and 200HP V6 2.0L / 2.5L applications using the 27-782461 gasket family

  

• HP Range: commonly 135HP - 200HP where specified

• Engine Type: Mercury / Mariner V6 two-stroke, 2.0L / 2.5L family

• System Type: Inner exhaust adapter / megaphone gasket

  

🔌 Function

  

The gasket seals the inner exhaust adapter / megaphone joint, helping maintain correct exhaust routing and preventing exhaust gas or water leakage at the adapter plate.

  

Common signs of failure:

  

• Exhaust leak at adapter area

• Water or exhaust residue around adapter plate

• Gasket damaged during powerhead removal

• Corrosion around exhaust housing joint

• Poor sealing after previous rebuild

• Replacement required during exhaust adapter or powerhead service

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 15.95 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.95 AUD | In stock |

## Images

- 27-782461 Mercury MerCruiser Gasket Inner Exhaust Adapter | Genuine Quicksilver OEM Part
- 27-782461 Mercury MerCruiser Gasket Inner Exhaust Adapter | Genuine Quicksilver OEM Part
- 27-782461 Mercury MerCruiser Gasket Inner Exhaust Adapter | Genuine Quicksilver OEM Part
- 27-782461 Mercury MerCruiser Gasket Inner Exhaust Adapter | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/27-782461-mercury-mercruiser-gasket-inner-exhaust-adapter-genuine-quicksilver-oem-part)
> Updated: 2026-07-18