# 803751 Mercury MerCruiser Liner Water Pump | Genuine Quicksilver OEM Part

🔧 Product Description

  

Genuine Quicksilver Water Pump Liner - Part Number: 803751

  

Genuine Quicksilver/Mercury stainless steel water pump cup liner for selected Mercury and Mariner small outboard water pump housings. This OEM liner is used inside the 803750A02-style water pump housing to provide the correct wear surface for the impeller.

  

⚙️ Key Features

  

• Genuine Quicksilver/Mercury OEM water pump liner

• Stainless steel cup liner for lower-unit water pump housing

• Used with 803750A02 water pump housing applications

• Helps restore correct impeller sealing and pump efficiency

• Designed for selected 6HP, 8HP, 9.8HP and 9.9HP outboards

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 803751

• 803751 1 related listing reference

  

OEM / Related Numbers:

  

• 803751

• 8037511

• 803751 1

• 803750A02 related water pump housing

• Tohatsu: 350-65011-1 related liner reference

  

Aftermarket / Verified Equivalents:

  

• Tohatsu / Nissan: 350-65011-1

• Aftermarket liner equivalents available where matched to 803750A02 pump housing

  

🚤 Compatibility

  

Commonly used on:

  

• Mercury / Mariner small outboard lower-unit water pump assemblies

• Water pump housings using the 803750A02 liner-style cup

• Mercury / Tohatsu-built small outboard pump assemblies

  

Typically suits:

  

• Engine models:

• Mercury / Mariner 6HP outboards using 803750A02 water pump housing

• Mercury / Mariner 8HP outboards using 803750A02 water pump housing

• Mercury / Mariner 9.8HP outboards using 803750A02 water pump housing

• Mercury / Mariner 9.9HP outboards using 803750A02 water pump housing

• Tohatsu / Nissan small outboard applications using 350-65011-1 liner reference

• Mercury / Mariner service applications where 803751 liner is specified in the gearcase water pump parts diagram

  

• HP Range: 6HP - 9.9HP

• Engine Type: Mercury / Mariner small outboard lower-unit water pump system

• Year Range: Application dependent by serial number and 803750A02 water pump housing fitment

  

🔌 Function

  

The water pump liner forms the stainless wear surface inside the pump housing where the impeller rotates. A good liner helps the impeller seal correctly, maintain water pressure and pump cooling water efficiently.

  

Common signs of failure:

  

• Weak or inconsistent tell-tale water stream

• Poor water pressure after impeller replacement

• Scored, worn or distorted liner surface

• Engine overheating at idle or low speed

• Pump not priming correctly

• Visible grooves or corrosion inside the pump cup

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 26.8 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 26.80 AUD | In stock |

## Images

- 803751 Mercury MerCruiser Liner Water Pump | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/803751-mercury-mercruiser-liner-water-pump-genuine-quicksilver-oem-part)
> Updated: 2026-05-17