# 66T-44311-00 Yamaha Water Pump Housing | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Lower-Unit Water Pump Housing - Part Number: 66T-44311-00

  

A genuine Yamaha water-pump housing for selected F25, T25, F30 and F40 four-stroke outboards.

  

The housing encloses the flexible impeller and directs water from the lower-unit inlet into the engine cooling tube. Its internal surface must remain smooth and correctly shaped for the impeller to generate reliable suction and pressure.

  

⚙️ Key Features

  

• Genuine Yamaha OEM water-pump housing

• Correct Yamaha part number 66T-44311-00

• Designed for the 66T-series lower-unit water pump

• Fits selected 25HP to 40HP four-stroke outboards

• Cross-references with Recmar / Parsun housing and complete aftermarket pump kits

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 66T-44311-00 current Yamaha OEM water-pump housing reference

  

OEM / Related Numbers:

  

• 66T-44311-00

• 66T-44311-00-00

• 66T443110000

• 63D-44311-01 related replacement housing reference

• 66T-W0078-01 related water-pump repair kit

• 66T-44322-00 related pump insert

• 66T-44352-00 related impeller

  

Aftermarket / Verified Equivalents:

  

• Recmar / Parsun: PAF15-04000201

• Aftermarket housing: 63D-44311-01

• Sierra complete water-pump kit with housing: 18-3413

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha 25HP to 40HP four-stroke lower-unit water pumps

• Tiller and remote-control models using the 66T-series gearcase

  

Typically suits:

  

• Engine models:

• Yamaha F25 four-stroke 2-cylinder

• Yamaha T25 four-stroke - approximately 2001-2005

• Yamaha F30 four-stroke - approximately 2001-2005

• Yamaha F40 four-stroke 3-cylinder - approximately 2000 onward

• Yamaha F40A and F40B applications using the 66T-series pump

• Yamaha 25HP, 30HP and 40HP four-stroke gearcases using repair kit 66T-W0078-01

  

• HP Range: 25HP - 40HP

• Engine Type: Yamaha four-stroke outboard

• Year Range: Approximately 2000 - 2019, dependent on lower-unit design

  

🔌 Function

  

The housing surrounds the water-pump impeller and forms the chamber required to create suction and cooling-water pressure. It directs pumped water into the engine's cooling tube.

  

Common signs of failure:

  

• Internal housing surface is scored or melted

• Weak or absent tell-tale stream

• Engine overheats despite installation of a new impeller

• Housing is cracked, distorted or corroded

• Water leaks around the pump outlet or base

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 35.5 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 35.50 AUD | In stock |

## Images

- 66T-44311-00 Yamaha Water Pump Housing | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/66t-44311-00-00-water-pump-housing)
> Updated: 2026-07-11