6CJ-44315-00 Yamaha Water Pump Gasket | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Lower Water Pump Gasket - Part Number: 6CJ-44315-00

A genuine Yamaha lower water-pump gasket for selected F40G and F70A four-stroke outboards.

The gasket seals the water-pump plate and housing assembly to the lower unit, preventing cooling water from escaping beneath the impeller chamber.

⚙️ Key Features

• Genuine Yamaha OEM water-pump gasket

• Correct Yamaha part number 6CJ-44315-00

• Lower pump-plate sealing position

• Used in Yamaha F40G and F70A water-pump assemblies

• Included in complete 6CJ-series water-pump service kits

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 6CJ-44315-00 current Yamaha OEM service reference

OEM / Related Numbers:

• 6CJ-44315-00

• 6CJ-44315-00-00

• 6CJ443150000

• 6CJ-44316-00 related water-pump base gasket

• 6CJ-44324-00 related cartridge gasket

• 6CJ-W0078-00 related water-pump repair kit

• 6CJ-W0078-01 later repair-kit reference

Aftermarket / Verified Equivalents:

• Sea Sierra Marine: 6CJ-44315-00 direct-replacement gasket

• Included in Sierra: 18-3494 water-pump repair kit

• Included in aftermarket 6CJ-W0078-00 / 6CJ-W0078-01 pump kits

🚤 Compatibility

Commonly used on:

• Yamaha F40G and F70A lower-unit water pumps

Typically suits:

• Engine models:

• Yamaha F40G

• Yamaha F40GET

• Yamaha F70A

• Yamaha F70AET

• Yamaha F70AETL

• Yamaha F70LA

• Yamaha F70LA2

• HP Range: 40HP - 70HP

• Engine Type: Yamaha EFI four-stroke outboard

• Year Range: Approximately 2010 onward

🔌 Function

The gasket seals beneath the water-pump assembly so the impeller can draw and pressurise cooling water without leakage around the pump plate.

Common signs of failure:

• Weak cooling-water flow after pump servicing

• Engine overheats despite a serviceable impeller

• Water leaks beneath the pump plate

• Gasket tears during disassembly

• Pump components will not sit flat because of old gasket material

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging