Yamaha - Water Pump Impeller - YJA-01212-27-01

Overview

The Yamaha YJA-01212-27-01 Water Pump Impeller is a genuine original equipment manufacturer component designed to circulate cooling water through the engine and maintain proper operating temperature. The impeller is a critical part of the water pump system, using flexible blades to draw water from the lower unit and push it through the engine’s cooling passages.

A properly functioning impeller ensures consistent water circulation while the engine is running, helping prevent overheating and protecting internal engine components. Over time, impeller blades can wear, stiffen, or become damaged due to heat, debris, and continuous operation. Replacing the impeller during routine maintenance helps maintain reliable cooling system performance and supports long term engine durability.

Key Features

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

• Essential Cooling System Component – Circulates cooling water through the engine to maintain safe operating temperatures.

• Flexible Impeller Blade Design – Efficiently pumps water through the cooling system during engine operation.

• Durable Marine Construction – Built to withstand heat, friction, and continuous water exposure.

Compatibility

Compatible with select Yamaha engines and equipment that utilize this water pump impeller.

Why is this prop a strong choice vs. alternatives?

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

• Helps Prevent Engine Overheating – Maintains consistent cooling water circulation through the engine.

• Supports Reliable Engine Operation – Helps maintain proper engine temperature and performance.

• Essential Preventative Maintenance Part – Routine replacement helps extend engine life and reliability.

Frequently Asked Questions

Q: What does a water pump impeller do?
A: It rotates inside the water pump housing to draw water into the cooling system and circulate it through the engine.

Q: When should a water pump impeller be replaced?
A: Many technicians recommend inspecting or replacing the impeller annually or after approximately one hundred hours of engine operation.

Q: Is this a genuine Yamaha part?
A: Yes. The YJA-01212-27-01 is a genuine Yamaha original equipment manufacturer water pump impeller.

Q: What happens if an impeller fails?
A: A failed impeller can stop water circulation, which may cause the engine to overheat.

Q: Is this typically replaced during water pump service?
A: Yes. The impeller is commonly replaced during routine water pump maintenance to ensure proper cooling system operation.