259991 - Miller 259991 Replacement Kohler ECH730 EFI Gas Engine

Genuine Miller Replacement Power Plant

The Miller 259991 is a complete replacement engine assembly featuring the Kohler Command PRO ECH730 with Electronic Fuel Injection (EFI). Designed as a direct OEM replacement for specific Miller engine-driven welders, such as select Trailblazer and Bobcat models, this unit ensures your equipment operates at peak performance levels. The integration of EFI technology represents a significant upgrade in operational efficiency, providing precise fuel delivery that adapts to load changes and environmental conditions instantly.

This air-cooled V-Twin engine is engineered for the rigorous demands of industrial welding applications. The ECH730 model is renowned for its durability and low maintenance requirements. By eliminating the carburetor, the EFI system removes the most common cause of engine downtime—fuel system gumming and carburetor icing. This results in a machine that starts reliably in cold weather, at high altitudes, and after periods of storage, ensuring that your welding operations are not hindered by engine troubleshooting.

Technicians will appreciate the plug-and-play nature of this genuine Miller part. It is configured to match the mounting points and coupling requirements of the compatible Miller generator assembly. The engine block features heavy-duty construction with cast iron cylinder liners and a high-efficiency air filtration system, protecting internal components from the dust and debris common on job sites. Whether replacing a high-hour unit or repairing a damaged engine, the Miller 259991 restores the factory specifications of your power source.

Note: Please verify fitment using your machine's serial number before ordering, as engine specifications can vary between different revisions of welding generators.