4677822A1 Mercury MerCruiser Top Water Pump Body | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Upper Water Pump Body - Part Number: 46-77822A1

A genuine Quicksilver upper water pump body used in selected Mercury / Mariner two-stroke outboard lower-unit water pump assemblies. This top pump body houses the impeller and works with the lower pump base, wear plate and seals to maintain correct cooling water pressure.

⚙️ Key Features

• Genuine Quicksilver OEM upper water pump body

• Correct Mercury part number 46-77822A1

• Upper pump housing for selected small plastic pump housing applications

• Used with matching impeller, gaskets, wear plate and lower pump components

• Helps restore correct pump chamber sealing and water flow

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 46-77822A1 current OEM water pump body reference

• 77822A1 related OEM reference

OEM / Related Numbers:

• 46-77822A1

• 77822A1

• 4677822A1

• 46-48746A1

• 46-48746A3

• 48753

Aftermarket / Verified Equivalents:

• Sierra: 18-3118

• GLM: 12420

• Mallory: 9-43202

• SEI Marine: 96-264-01BK

🚤 Compatibility

Commonly used on:

• Mercury / Mariner 20HP - 70HP two-stroke outboard lower-unit water pump applications with the small plastic pump housing layout

Typically suits:

• Engine models:

• Mercury 20HP two-stroke water pump applications with small plastic pump housing

• Mercury 30HP two-stroke water pump applications with small plastic pump housing

• Mercury 35HP two-stroke water pump applications with small plastic pump housing

• Mercury 40HP two-stroke water pump applications with small plastic pump housing

• Mercury 45HP two-stroke water pump applications with small plastic pump housing

• Mercury 50HP two-stroke water pump applications with small plastic pump housing

• Mercury 60HP two-stroke water pump applications with small plastic pump housing

• Mercury 70HP 3-cylinder - serial 4571652 to 4977156

• Mercury 70HP - serial 4977157 to 6428680

• Mercury / Mariner 35HP - 70HP outboard pump housing applications using upper pump body 46-77822A1

• Mercury / Mariner 20HP - 70HP two-stroke outboards using Sierra 18-3118 / GLM 12420 equivalent pump housing

• HP Range: 20HP - 70HP

• Engine Type: Mercury / Mariner two-stroke outboard

• System Type: Lower-unit upper water pump body / small plastic pump housing

🔌 Function

The upper water pump body forms the pump chamber around the impeller, helping create suction and pressure to move cooling water from the lower unit through the engine.

Common signs of failure:

• Scored or grooved pump body

• Weak cooling water flow

• Engine overheating after impeller replacement

• Distorted or cracked pump housing

• Poor sealing between the pump body, plate and gasket surfaces

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging