# 26804875 Mercury MerCruiser Seal Kit | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Direct Injector Seal Kit - Part Number: 26-804875

  

A genuine Quicksilver seal kit for the air or direct injector fitted to selected Mercury and Mariner OptiMax / DFI outboard engines and Sport Jet powerheads.

  

Each kit services one injector and contains the sealing components required between the injector, fuel rail and cylinder-head assembly. Correct injector sealing is critical to maintaining the pressurised air-and-fuel system used by Mercury direct-injection engines.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM injector seal kit

• Correct Mercury part number 26-804875

• Services one air or direct injector

• Contains the injector sealing O-rings required for installation

• Used across 1.5L, 2.5L and 3.0L OptiMax / DFI engine families

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 26-804875 → Supersedes 26-835083

• 26-835083 earlier OEM air-injector seal reference

  

OEM / Related Numbers:

  

• 26-804875

• 804875

• 26804875

• 26-835083

• 835083

• 745061277144

  

Aftermarket / Verified Equivalents:

  

• Offshore Marine: 61114875

• MarinePro: Air Injector Seal Kit replacing 804875

• Replacement injector seal kits referencing 26-804875 / 26-835083

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury and Mariner OptiMax / DFI direct-injection systems

• Mercury Pro XS and Mercury Racing direct injectors

• Mercury Sport Jet direct-injection powerheads

  

Typically suits:

  

• Engine models:

• Mercury 75 DFI 1.5L 3-cylinder - serial 0T980000 to 1B226999

• Mercury 75 DFI 1.5L 3-cylinder - serial 1B227000 to 1B417701

• Mercury 75 DFI 1.5L 3-cylinder - serial 1B417702 to 1B736885

• Mercury 75 DFI 1.5L 3-cylinder - serial 1B736885 and above

• Mercury 80 Jet DFI 1.5L 3-cylinder

• Mercury 90 DFI 1.5L 3-cylinder - serial 0T801000 to 1B226999

• Mercury 90 DFI 1.5L 3-cylinder - serial 1B227000 to 1B417701

• Mercury 90 DFI 1.5L 3-cylinder - serial 1B417702 to 1B736885

• Mercury 90 DFI 1.5L 3-cylinder - serial 1B736885 and above

• Mercury 115 DFI 1.5L 3-cylinder - serial 0T801000 to 1B226999

• Mercury 115 DFI 1.5L 3-cylinder - serial 1B227000 to 1B417701

• Mercury 115 DFI 1.5L 3-cylinder - serial 1B417702 to 1B736885

• Mercury 115 DFI 1.5L 3-cylinder - serial 1B736885 and above

• Mercury 115 Pro XS 1.5L

• Mercury 125 DFI 1.5L 3-cylinder

• Mercury 110 Jet DFI 2.5L

• Mercury V135 DFI 2.5L - serial 0T801000 to 1B226999

• Mercury V135 DFI 2.5L - serial 1B227000 to 1B417701

• Mercury V135 DFI 2.5L - serial 1B417702 and above

• Mercury V150 DFI 2.5L - serial 0T801000 to 1B226999

• Mercury V150 DFI 2.5L - serial 1B227000 to 1B417701

• Mercury V150 DFI 2.5L - serial 1B417702 and above

• Mercury V175 DFI 2.5L - serial 0T801000 to 1B226999

• Mercury V175 DFI 2.5L - serial 1B227000 to 1B417701

• Mercury V175 DFI 2.5L - serial 1B417702 and above

• Mercury 150 Pro XS 2.5L - serial 1B690542 and above

• Mercury 175 Pro XS 2.5L - serial 1B516339 and above

• Mercury 200 DFI / OptiMax 3.0L

• Mercury 200 Pro XS 3.0L

• Mercury 225 DFI / OptiMax 3.0L

• Mercury 225 Pro XS 3.0L - serial 1B104549 to 1B426560

• Mercury 250 DFI / OptiMax 3.0L

• Mercury 250 Pro XS 3.0L

• Mercury Racing 200XS DFI

• Mercury Racing 250XS DFI - serial 0T651945 to 0T818042

• Mercury Racing 300XS DFI

• Mercury 200 DFI Sport Jet

• Mercury 240 EFI / DFI Sport Jet

• Mercury 250 DFI Sport Jet

  

• HP Range: 75HP - 300HP

• Engine Type: Mercury / Mariner 1.5L, 2.5L and 3.0L DFI / OptiMax

• Year Range: Approximately 1997-2018, dependent on engine family and serial number

  

🔌 Function

  

The seals maintain an airtight and fuel-tight joint around the direct injector. This allows the pressurised air-and-fuel system to deliver the correctly atomised charge into the combustion chamber.

  

Common signs of failure:

  

• Rough idle or cylinder misfire

• Hard starting or extended cranking

• Fuel, air or combustion leakage around the injector

• Carbon staining around the injector bore

• Injector balance, air-pressure or fuel-pressure faults

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 34.5 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 34.50 AUD | In stock |

## Images

- 26804875 Mercury MerCruiser Seal Kit | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/26804875-mercury-mercruiser-seal-kit-genuine-quicksilver-oem-part)
> Updated: 2026-07-18