FUYEAR Water Pump Assembly for HiSun UTV & Yamaha Rhino/Grizzly 660 (2002–2008) with O‑Ring, Direct‑Fit Replacement

FUYEAR water pump assembly with O‑ring replaces worn cooling pumps on compatible HiSun UTVs and select Yamaha ATVs to restore engine coolant circulation.

This aftermarket water pump is a direct-fit replacement designed for a range of utility vehicles, including many HiSun 500/700 models and specific Yamaha machines. Supplied complete with the sealing O‑ring, the unit uses aftermarket part references (Hisun 19700‑004‑0000, Yamaha 5KM‑12420‑10‑00) and is built to withstand temperature extremes while maintaining a reliable seal during wading and regular riding conditions. Before ordering, verify fitment against your vehicle model and year to ensure compatibility.

What vehicles will this water pump fit?

The assembly fits most HiSun 500 and 700 ATV/UTV platforms and a number of OEM-equivalent models, plus specific Yamaha machines. Always cross-check the part number and your machine’s model year for a correct match.

• Compatible HiSun-family machines: HiSun UTV MSU 500/700, Supermach, Massimo and similar 500/700cc platforms.
• Compatible Yamaha models: Rhino 660 (2004–2007) and Grizzly 660 (2002–2008).
• Aftermarket reference numbers included for verification: Hisun 19700‑004‑0000, Yamaha 5KM‑12420‑10‑00.
• Includes one water pump plus a replacement O‑ring for immediate installation.

How durable and reliable is the replacement pump?

The pump is engineered for stable operation across a wide temperature range and to resist leakage when used under normal riding and shallow wading conditions. It’s produced as an aftermarket assembly to meet functional expectations for cooling performance.

• Materials selected for high and low temperature resistance.
• Designed to maintain a secure seal with the included O‑ring.
• Meets typical OEM-style tolerances for fit and rotation balance.
• Built for routine ATV/UTV use, trail riding, and light off-road exposure.

What should I check before buying and installing?

Measure and verify part compatibility with your vehicle’s year and model; size is manually measured so the actual unit may vary slightly. If you’re unsure about fitment or installation, consult a mechanic or contact the seller for guidance.

• Confirm your vehicle make, model, and production year against the compatibility list.
• Compare the pump’s aftermarket part numbers to your existing pump.
• Inspect the impeller and housing on the old pump for wear during replacement.
• Have basic tools and coolant handling supplies ready for installation and bleeding.

Who is this for? This FUYEAR water pump assembly is intended for owners and mechanics who need a dependable replacement cooling component for HiSun 500/700 UTVs and certain Yamaha Rhino/Grizzly 660 models. It’s suitable for riders maintaining or repairing their machines, fleet operators seeking a cost-effective aftermarket option, and anyone who wants a complete pump with O‑ring included for immediate swap-out. If doubts about fit arise, contact the seller or refer to your vehicle’s service manual before purchase. FUYEAR stands behind customer service and will help resolve product questions during or after the sale.