# 89876A3 Mercury MerCruiser Base Assembly | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Water Separating Fuel Filter Base Assembly - Part Number: 89876A3

  

A genuine Quicksilver off-engine water separating fuel filter base assembly for marine petrol fuel systems. This cast aluminium base provides the bracket and 11/16-16 threaded filter head for compatible Mercury / Quicksilver spin-on fuel / water separator elements.

  

⚙️ Key Features

  

• Genuine Quicksilver OEM fuel filter base assembly

• Correct Mercury part number 89876A3

• Off-engine / vessel-mounted water separating fuel filter bracket

• Accepts standard Mercury / Quicksilver canister-style fuel / water separator elements

• Includes 11/16-16 thread brass fuel-line fittings where supplied

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 89876A3 current OEM fuel filter base assembly reference

  

OEM / Related Numbers:

  

• 89876A3

• 89876 A3

• 89876

• 35-8M0146203 related 11/16-16 fuel / water separator element

• 35-8M0103095 related fuel / water separator element

• 35-809097 related filter element

• 35-802893Q01 related 25-micron filter element in selected assemblies

• 22-816133 related fitting

• 22-32561 related pipe plug

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-7777-1

• Sierra: 18-7853-1 style equivalent

• Mallory: 9-37855 / 9-37860 style equivalents

• GLM: 25000 style equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / MerCruiser vessel-mounted fuel / water separator installations

  

Typically suits:

  

• Fuel system applications:

• Mercury outboard remote fuel / water separator installations using 11/16-16 spin-on filter elements

• Mercury / Mariner petrol outboard installations using a vessel-mounted fuel filter head

• MerCruiser petrol sterndrive remote fuel / water separator installations using 89876A3 filter base

• MerCruiser inboard petrol fuel system installations using a compatible remote filter head

• Marine fuel systems using 35-809097, 35-8M0103095 or 35-8M0146203 spin-on filter elements

• Marine fuel systems using 35-802893Q01 filter elements where the matching 89876A3-style base is fitted

• Boat-mounted fuel / water separator systems requiring Mercury-style 11/16-16 thread filter base

  

• Engine Type: Mercury outboard and MerCruiser petrol fuel systems where compatible remote filter head is fitted

• System Type: Remote water separating fuel filter base

• Thread Type: 11/16-16

• Fitment Note: This is an off-engine installation part, so it is generally matched by fuel-system installation and filter thread rather than a single engine serial range

  

🔌 Function

  

The base assembly holds the fuel / water separating filter element and routes fuel through the filter before it reaches the engine fuel system.

  

Common signs of failure:

  

• Fuel leakage around filter head

• Damaged filter threads

• Corrosion on bracket or fittings

• Filter will not seal correctly

• Fuel restriction or air leak at filter base

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 107.45 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 107.45 AUD | In stock |

## Images

- 89876A3 Mercury MerCruiser Base Assembly | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/89876a3-mercury-mercruiser-base-assembly-genuine-quicksilver-oem-part)
> Updated: 2026-05-17