6H3-44315-A0 Yamaha Water Pump Gasket | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Lower Water Pump Plate Gasket - Part Number: 6H3-44315-A0

A genuine Yamaha water-pump gasket fitted beneath the cartridge outer plate on selected 40HP to 70HP outboards.

The gasket seals the pump plate to the gearcase so cooling water cannot bypass beneath the impeller chamber.

⚙️ Key Features

• Genuine Yamaha OEM water-pump gasket

• Correct Yamaha part number 6H3-44315-A0

• Lower pump-plate sealing position

• Included in Yamaha 6H3-series water-pump repair kits

• Aftermarket individual gaskets and complete pump kits available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 6H3-44315-A0 current Yamaha OEM service reference

• 6H3-44315-00 related earlier gasket reference

OEM / Related Numbers:

• 6H3-44315-A0

• 6H3-44315-A0-00

• 6H344315A000

• 6H3-44315-00

• 6H3-44324-A0 related cartridge gasket

• 6H3-44323-00 related wear plate

• 6H3-44352-00 related impeller

• 6H3-W0078-01 and 6H3-W0078-02 related water-pump kits

Aftermarket / Verified Equivalents:

• Included in Sierra: 18-3415 water-pump kit

• Included in Sea Sierra: 6H3-W0078 replacement kit

• Included in Recmar 6H3-series water-pump kits

• Asaki: 6H3-44315-A0 direct replacement gasket

🚤 Compatibility

Commonly used on:

• Yamaha 6H3-series lower-unit water pumps

Typically suits:

• Engine models:

• Yamaha 25B selected gearcases

• Yamaha 40F, 40V and 40Y

• Yamaha 50G and 50H

• Yamaha 55B

• Yamaha C60 and 60F

• Yamaha 70B and 70C

• Yamaha F40A, F40C, F40D and F40G

• Yamaha F50A, F50B, F50D and F50F

• Yamaha FT50 high-thrust models

• Yamaha F60A and F60C

• Yamaha FT60 high-thrust models

• Yamaha F70A applications using the 6H3 pump family

• HP Range: 40HP - 70HP, plus selected 25B applications

• Engine Type: Yamaha two-stroke and four-stroke outboard

• Year Range: Approximately 1984 - 2017, dependent on gearcase

🔌 Function

The gasket seals beneath the pump plate and prevents cooling water or air from bypassing the impeller chamber.

Common signs of failure:

• Weak cooling-water flow after pump servicing

• Engine overheats despite a serviceable impeller

• Water leaks beneath the pump plate

• Gasket is torn or compressed

• Old gasket material prevents the plate from sitting flat

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging