Water Pump Housing -12an Yamaha Micro Sprint

The Water Pump Housing – 12AN Yamaha Micro Sprint from JOES RACING PRODUCTS is purpose-built for high-performance marine cooling systems on compact Yamaha sprint platforms. This mechanical water pump housing serves as the hub of your engine's cooling loop, directing coolant flow through the block and radiator under load. Whether you're racing tight circuits or pushing a Micro Sprint hard on the water, reliable cooling circulation is non-negotiable for engine longevity and consistent power delivery.

Machined from aluminum and finished in black anodized coating, this housing resists corrosion and thermal stress while maintaining a lightweight profile—critical for sprint applications where every ounce counts. The 12 AN male inlet provides a secure, standardized connection point for aftermarket cooling lines and quick-disconnects, ensuring consistent flow rates and eliminating leaks at high RPM. Anodized aluminum also dissipates heat efficiently, preventing localized hot spots that can compromise pump seals and housing integrity during extended competition runs.

Competitors and enthusiasts building or upgrading Yamaha Micro Sprint cooling systems will find this OEM-quality housing essential for systems running higher coolant pressures or custom loop configurations. Installation pairs seamlessly with existing JOES RACING manifolds and adapters, and the compact 5 × 1.5 × 5 inch footprint fits tight engine bays without obstruction. Verify your inlet and outlet port locations and line routing before final assembly to maximize flow efficiency and minimize air pockets in the cooling circuit.