# 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

## Details

- **Price:** 11.85 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 11.85 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6cj-44315-00-gasket-water-pump)
> Updated: 2026-07-11