# 63D-W0078-03 Yamaha Water Pump Repair Kit | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Water Pump Repair Kit - Part Number: 63D-W0078-03-00

  

A genuine Yamaha OEM water pump repair kit used for Yamaha 40HP, 50HP and 60HP lower-unit cooling-system service. This kit includes the main water pump service components required to restore pump pressure and cooling-water flow.

  

⚙️ Key Features

  

• Genuine Yamaha OEM water pump repair kit

• Correct Yamaha part number 63D-W0078-03-00

• Complete water pump service kit

• Includes cartridge insert, gasket, outer plate, impeller, O-ring, damper, bolts and woodruff key

• Used on Yamaha 40HP to 60HP water pump assemblies where specified

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 63D-W0078-03-00 later Yamaha water pump repair kit reference

• 63D-W0078-01-00 related earlier Yamaha water pump repair kit reference

• 63D-W0078-00-00 related earlier Yamaha water pump repair kit reference

  

OEM / Related Numbers:

  

• 63D-W0078-03-00

• 63D-W0078-03

• 63DW00780300

• 63DW007803

• 63D-W0078-01-00

• 63D-W0078-01

• 63D-W0078-00-00

• 63D-W0078-00

  

Included / Related Kit Components:

  

• 63D-44312-00-00 Housing Cover

• 63D-44316-00-00 Water Pump Gasket

• 63D-44322-00-00 Cartridge Insert

• 63D-44323-00-00 Outer Plate Cartridge

• 663-44366-01-00 Water Seal Damper

• 6H3-44352-00-00 Impeller

• 90119-08185-00 Bolts with Washer

• 90280-03024-00 Woodruff Key

• 93210-59MG7-00 O-Ring

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-3434 water pump repair kit without housing

• Sierra: 18-3415 water pump kit with housing

• Outboard Spares: OSWK63D

• Recmar: REC63D-W0078-01

• SeaSierra: 63DW0078 kit family

• Aftermarket reference: HJ YHJB-63D

• Aftermarket reference: 63D-W0078-03 / 63D-W0078-01 / 63D-W0078-00

• Aftermarket water pump kit with housing for Yamaha 40HP / 50HP / 60HP outboards

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha 40HP to 60HP lower-unit water pump assemblies

• Yamaha 63D-series water pump service applications

  

Typically suits:

  

• Engine models:

• Yamaha C40 two-stroke water pump service applications

• Yamaha P40 two-stroke water pump service applications

• Yamaha 40V / 40Y water pump service applications

• Yamaha F40A / F40C / F40D / F40H four-stroke water pump service applications

• Yamaha 50H water pump service applications

• Yamaha F50A / F50D / F50F / F50H four-stroke water pump service applications

• Yamaha FT50B / FT50C high-thrust water pump service applications

• Yamaha F60A / F60B / F60C / F60F four-stroke water pump service applications

• Yamaha T60 / FT60 high-thrust water pump service applications

  

• HP Range: commonly 40HP - 60HP where specified

• Engine Type: Yamaha outboard lower-unit water pump assembly

• Kit Type: Complete water pump / impeller repair kit

  

🔌 Function

  

The water pump repair kit restores cooling-water pump performance by replacing the impeller, insert, gasket and related sealing components that create water pressure and flow.

  

Common signs of failure or service need:

  

• Weak tell-tale stream

• Engine overheating

• Temperature alarm

• Impeller blades cracked, missing or permanently bent

• Pump insert scored from sand or debris

• Pump damaged from dry running

• Water pump service due at maintenance interval

• Poor cooling pressure at idle or cruise

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 124.74 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 124.74 AUD | In stock |

## Images

- 63D-W0078-03 Yamaha Water Pump Repair Kit | Genuine OEM Yamaha Outboard Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/63d-w0078-03-water-pump-repair-kit)
> Updated: 2026-07-11