6L2-W0078-00 Yamaha Water Pump Repair Kit | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Water Pump Repair Kit - Part Number: 6L2-W0078-00

A genuine Yamaha water-pump service kit for selected 20HP and 25HP two-stroke outboards.

The kit contains the impeller, cartridge insert, outer plate, O-ring, woodruff key and pump fasteners required to renew the principal working components of the lower-unit cooling-water pump.

⚙️ Key Features

• Genuine Yamaha OEM water-pump repair kit

• Correct Yamaha part number 6L2-W0078-00

• Includes impeller, wear components, seal and hardware

• Designed for Yamaha 20D and 25N lower units

• Sierra and HJ Marine replacement kits available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 6L2-W0078-00 current OEM water-pump repair-kit reference

OEM / Related Numbers:

• 6L2-W0078-00

• 6L2-W0078-00-00

• 6L2-44323-00 outer plate

• 93210-45161 O-ring

• 6L2-44352-00 impeller

• 6L2-44322-00 cartridge insert

• 97095-06040 housing bolts

• 90280-03024 woodruff key

• 6L2-44311-01 related housing

Aftermarket / Verified Equivalents:

• Sierra: 18-3431 water-pump kit without housing

• Sierra: 18-4527 water-pump kit with housing

• HJ Marine: YHJB-6L2

• HJ Marine: YHJB-6L2WH with housing

• Aftermarket Yamaha 6L2 complete pump kit

🚤 Compatibility

Commonly used on:

• Yamaha 20HP and 25HP lower-unit water-pump servicing

• Cooling-system maintenance where the housing remains reusable

Typically suits:

• Engine models:

• Yamaha 20D two-stroke - approximately 1988-2011 / 2016 by market

• Yamaha 20DMH two-stroke

• Yamaha 25D two-stroke - approximately 1995-1998

• Yamaha 25N two-stroke - approximately 1988 onward

• Yamaha 25NMH two-stroke

• Corresponding Yamaha-built Mariner 20HP and 25HP gearcases using the 6L2 pump

• HP Range: 20HP - 25HP

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

• Year Range: Approximately 1988 through the 2010s, dependent on model.

🔌 Function

The kit restores the impeller chamber, sealing surfaces and drive connection required for reliable cooling-water circulation.

Common signs the kit is required:

• Weak tell-tale flow

• Engine overheats

• Impeller vanes are damaged

• Wear plate or cartridge insert is scored

• Pump has not been serviced within the recommended interval

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging