266531 - Miller 12-Gallon Fuel Tank Assembly with Sender

Genuine Miller Replacement Fuel Tank Assembly

The Miller 266531 Fuel Tank Assembly is a critical OEM replacement component designed for specific Miller engine-driven welders, including select Bobcat and Trailblazer models. When your machine's fuel system is compromised by cracks, leaks, or impact damage, this genuine Miller part ensures your equipment returns to safe, reliable operation. With a substantial 12-gallon capacity, this tank is engineered to match the runtime specifications of your welder, allowing for long shifts without frequent refueling interruptions.

This assembly is more than just a plastic shell; it comes pre-equipped with essential fuel system components to streamline installation. It includes the fuel level sender unit already mounted, which connects directly to your machine's wiring harness to provide accurate fuel gauge readings on the front panel. Additionally, the integrated vent valve ensures the tank breathes correctly, preventing vacuum lock that could starve the engine of fuel during operation. Manufactured from high-density polyethylene, the tank is built to resist corrosion from modern fuels and withstand the vibration and rough handling typical of industrial job sites.

Compatibility and Installation

This tank is designed for a direct drop-in fit for compatible chassis, ensuring that mounting points and fuel line connections align perfectly without modification. It is commonly used on newer generation Bobcat 225, Bobcat 250, and Trailblazer 325/275 models (verify serial number compatibility). By using genuine Miller parts, you maintain the structural integrity and safety compliance of your welding generator.