Yamaha - Impeller Housing (WT40X) - YJA-01156-30-02

Overview

The Yamaha YJA-01156-30-02 Impeller Housing (WT40X) is a genuine original equipment manufacturer component designed to protect and support the water pump impeller within the engine’s cooling system. The impeller housing forms a critical part of the water pump assembly, providing the chamber where the impeller rotates to circulate cooling water throughout the engine.

A properly functioning impeller housing helps maintain efficient water flow and ensures the impeller operates correctly within the pump system. Over time, internal wear, debris, or corrosion can affect the housing surface and reduce pump efficiency. Replacing a worn housing with a genuine Yamaha component helps restore optimal cooling performance and supports reliable engine operation in demanding marine conditions.

Key Features

• Genuine Yamaha Original Equipment Manufacturer Component – Manufactured to Yamaha factory specifications for proper fit and dependable performance.

• Essential Water Pump Component – Houses the impeller and supports efficient cooling water circulation.

• Precision Engineered Design – Ensures proper alignment and smooth operation of the water pump system.

• Durable Marine Construction – Built to withstand continuous water exposure, friction, and demanding operating conditions.

Compatibility

Compatible with select Yamaha outboard engines that utilize the WT40X impeller housing configuration.

Why is this prop a strong choice vs. alternatives?

• Original Equipment Manufacturer Yamaha Fitment – Designed specifically for Yamaha water pump systems.

• Supports Efficient Cooling System Operation – Helps maintain proper water flow through the engine.

• Restores Water Pump Performance – Replacing worn housings helps ensure proper impeller function.

• Marine Grade Durability – Built to handle harsh marine environments and long term engine operation.

Frequently Asked Questions

Q: What does an impeller housing do?
A: The impeller housing forms the chamber where the water pump impeller rotates, allowing the pump to circulate cooling water through the engine.

Q: When should an impeller housing be replaced?
A: Replacement may be necessary if the housing becomes worn, damaged, or corroded, which can reduce water pump efficiency.

Q: Is this a genuine Yamaha part?
A: Yes. The YJA-01156-30-02 is a genuine Yamaha original equipment manufacturer impeller housing.

Q: Can a worn impeller housing affect engine cooling?
A: Yes. Wear inside the housing can reduce pump efficiency and affect cooling water circulation.

Q: Is this typically replaced during water pump service?
A: It may be replaced during water pump service if inspection reveals wear or damage.