6L2-44311-01 Yamaha Housing | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Water Pump Housing - Part Number: 6L2-44311-01

A genuine Yamaha upper water-pump housing for selected 20HP and 25HP outboard lower units.

The housing surrounds the flexible impeller and forms the pump chamber that draws cooling water through the gearcase intake and directs it into the engine water tube.

⚙️ Key Features

• Genuine Yamaha OEM water-pump housing

• Correct Yamaha part number 6L2-44311-01

• Precision-moulded impeller chamber

• Used with Yamaha impeller 6L2-44352-00

• Complete aftermarket housing kits available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 6L2-44311-01 current OEM water-pump housing reference

• 6L2-44311-00 earlier related housing reference

OEM / Related Numbers:

• 6L2-44311-01

• 6L2-44311-01-00

• 6L2-44311-00

• 6L2-44352-00 related impeller

• 6L2-44322-00 related cartridge insert

• 6L2-44323-00 related wear plate

• 6L2-W0078-00 related water-pump kit

Aftermarket / Verified Equivalents:

• Sierra: housing supplied in 18-4527 water-pump kit

• HJ Marine: YHJB-6L2WH housing kit

• Aftermarket Yamaha housing: 6L2-44311-01 replacement

🚤 Compatibility

Commonly used on:

• Yamaha 20HP and 25HP lower-unit water pumps

• Complete pump rebuilding where the original housing is scored or distorted

Typically suits:

• Engine models:

• Yamaha 20D two-stroke

• Yamaha 20DMH two-stroke

• Yamaha 20D long-shaft applications

• Yamaha 25N two-stroke

• Yamaha 25NMH two-stroke

• Yamaha 25D applications using the 6L2 water-pump family

• Corresponding Yamaha-built Mariner 20HP and 25HP lower units where specified

• HP Range: 20HP - 25HP

• Engine Type: Yamaha two-cylinder two-stroke outboard

• Year Range: Approximately late-1980s through the 2010s, dependent on lower-unit design.

🔌 Function

The housing forms the upper wall of the impeller chamber and directs pressurised cooling water into the water tube.

Common signs of failure:

• Housing is scored or melted

• Weak tell-tale flow with a new impeller

• Engine overheats at idle

• Housing cup is distorted

• Water leaks around the pump assembly

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging