Engine Water Pump Impeller & Shaft Assembly for 250cc Water-Cooled Engines

Product Overview

Restore your cooling system’s circulation with this Heavy-Duty Water Pump Assembly. Specifically engineered for the 250cc water-cooled horizontal engine platform (CF250/CH250), this kit features a precision-machined shaft and a high-flow 6-blade impeller. It is the essential internal component for maintaining the pressurized coolant flow required to keep your engine within safe operating temperatures, even under heavy loads.

Product Compatibility

Designed for the classic 250cc liquid-cooled engine series used in scooters, ATVs, and karts.

Vehicle Type	Common Compatible Brands & Models
Scooter / Moped	Honda Helix (CN250), Honda Elite (CH250), Jonway, Roketa
ATV / Go Kart	Hammerhead 250, TrailMaster, Joyner, Carter Talon
Engine Series	CF250, CH250, CN250 (172mm Style Engines)
Exclusions	NOT a replacement for the 2007 Mongoose 300.

Specifications (Measurement Guide)

To ensure 100% fitment, please verify these dimensions against your old shaft:

Component	Metric Measurement	Imperial Measurement
Total Shaft Length	113.5mm	4.47"
Impeller Design	6-Blade High-Flow	--
Bearing Inside Diameter	10mm	0.39"
Bearing Outside Diameter	19mm	0.75"
Material	High-Strength Corrosion-Resistant Alloy	--

Key Features

• High-Flow 6-Blade Impeller: The optimized blade geometry is designed to maximize coolant velocity, ensuring rapid heat transfer from the cylinder head to the radiator, preventing overheating damage.
• Corrosion-Resistant Shaft: Constructed from high-strength alloy treated for superior anti-corrosion properties, protecting the shaft from the erosive effects of long-term coolant exposure.
• Precision Sealed Bearing: Includes a pre-fitted bearing ($10mm \times 19mm$) designed for smooth, low-friction rotation and a long operational lifespan under high-RPM conditions.
• Leakage Prevention: Precision machining ensures a tight fit with the water pump mechanical seal (sold separately), significantly reducing the risk of coolant leaks and system pressure loss.
• Industrial Grade Durability: Built to withstand the harsh environment of a high-performance 250cc engine, providing stable operation for daily commuting or off-road adventures.