# 6CJ-W0078-00 Yamaha Water Pump Kit | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha F70 Water Pump Repair Kit - Part Number: 6CJ-W0078-00

  

A genuine Yamaha lower-unit water-pump repair kit for F70 four-stroke outboards.

  

The kit contains the impeller and principal gaskets, plates and service components needed to restore cooling-water flow during scheduled maintenance or pump repair.

  

⚙️ Key Features

  

• Genuine Yamaha OEM water-pump repair kit

• Correct Yamaha part number 6CJ-W0078-00

• Superseded by Yamaha kit 6CJ-W0078-01

• Designed for Yamaha F70 four-stroke lower units

• Cross-references with Sierra, HJ Marine, Recmar and Quicksilver kits

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 6CJ-W0078-01 → Supersedes 6CJ-W0078-00

• 6CJ-W0078-00 earlier Yamaha water-pump repair-kit reference

  

OEM / Related Numbers:

  

• 6CJ-W0078-01

• 6CJ-W0078-01-00

• 6CJ-W0078-00

• 6CJ-W0078-00-00

• 6CJW00780000

• 6CJ-44315-00 included water-pump gasket

• 6CJ-44324-00 included cartridge gasket

• 6H3-44352-00 included impeller

• 63D-44322-00 included cartridge insert

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-3494

• HJ Marine: HJ-YHJB-6CJ

• Recmar: REC6CJ-W0078-00

• Quicksilver: 8M6012800

• Full Power Plus: 6CJ-W0078-00 replacement kit

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha F70 four-stroke lower-unit water pumps

  

Typically suits:

  

• Engine models:

• Yamaha F70A

• Yamaha F70AET

• Yamaha F70AETL

• Yamaha F70LA

• Yamaha F70LA2

• Yamaha F70LA 0310 and 0410 production

• Yamaha F70LA 2011-2016 production

• Yamaha F70LA approximately 2010-2021 under the original kit reference

• Later F70 production using superseding kit 6CJ-W0078-01

  

• HP Range: 70HP

• Engine Type: Yamaha inline-four EFI four-stroke outboard

• Year Range: Approximately 2010 onward

  

🔌 Function

  

The kit renews the pump components responsible for drawing water through the lower unit and circulating it through the engine cooling system.

  

Common signs the kit is required:

  

• Weak or intermittent tell-tale stream

• Engine overheats at idle or under load

• Impeller blades are cracked, stiff or missing

• Wear plate or cartridge insert is scored

• Scheduled water-pump service interval has been reached

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 126.25 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 126.25 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6cj-w0078-00-water-pump-kit)
> Updated: 2026-07-11