OTO-KAUTOPARTS Fuel Pump Assembly for Hisun UTV HS/UTV 400-800 — Direct-Fit, One-Year Warranty

OTO-K Fuel Pump Assembly is a direct-fit electric fuel pump module designed to replace OEM units in Hisun UTV models (HS/UTV 400, 500, 700, 800) and compatible off-road vehicles.

This replacement fuel pump module restores reliable fuel flow for utility terrain vehicles and similar machines that use the listed OEM part numbers. Built to match or exceed original equipment specifications, the module addresses common fuel-delivery symptoms while providing an affordable aftermarket option backed by a one-year warranty and dedicated customer support.

How does this fuel pump improve UTV starting and acceleration?

The OTO-K pump maintains steady fuel pressure and delivers the volume required under load, which helps reduce hesitation and improve throttle response. It replaces worn modules that cause weak fuel delivery, helping the engine receive consistent fuel supply for smoother starts and acceleration.

• Restores correct fuel pressure and flow for balanced combustion.
• Reduces stalling and hesitation during acceleration.
• Direct-fit design matches OEM mounting and connectors for easier installation.

Will this module fit my vehicle and match OEM part numbers?

This assembly is made to fit an extensive list of models including Hisun HS400/HS500/HS700/HS800, TSC UTV series, Bennche Bighorn, Excalibur, Massimo, Menards Yardsport, Qlink Front Runner, and Supermach variants. It corresponds to OEM numbers such as 39500-115H-0000, 358700002, and 16521-055-0000, making it a true replacement option when those part numbers are referenced.

• Compatible with multiple UTV brands and model years that share the listed OEM numbers.
• Designed for plug-and-play fit where original mounts and electrical connections are unchanged.
• Check your OEM part number or vehicle compatibility list before ordering to ensure fit.

What are the construction and reliability features of this pump?

The module is manufactured using high-quality components to meet or exceed OEM standards for durability and consistent operation. Attention to materials and assembly helps resist common failure modes such as wear-induced pressure loss and electrical connector degradation.

• Premium materials chosen for corrosion and wear resistance.
• Engineered to deliver stable voltage and fuel output under typical UTV operating conditions.
• Backed by a one-year warranty and responsive customer service for replacement or troubleshooting.

How easy is installation and where can I get help if needed?

Installation is straightforward for technicians or experienced DIYers familiar with fuel system modules; the unit uses OEM-style mounting points and electrical plugs. OTO-K provides 24-hour online consultation and customer support to guide installation or handle any post-sale issues.

• Direct-replacement form factor for basic bolt-in and plug-in installation.
• Follow vehicle service manual for safe fuel-system procedures and pressure relief.
• Contact OTO-K support if connectors or fitment questions arise; one-year warranty covers defects.

Who is this for: This fuel pump assembly is ideal for owners and mechanics of Hisun UTVs and compatible off-road vehicles who need a dependable replacement for worn or failing fuel modules. Choose this unit if you require an affordable aftermarket part that aligns with OEM part numbers, offers straightforward installation for standard fuel systems, and includes warranty-backed support for peace of mind.