The Miller 249309<\/strong> is a complete replacement engine assembly designed specifically for compatible Miller engine-driven welding power sources. This unit features the Kohler Command PRO CH730<\/strong> (Spec 0228), a high-performance, air-cooled V-Twin engine engineered for the rigorous demands of industrial applications. Configured for Liquid Propane (LP) Gas<\/strong> operation, this engine ensures cleaner combustion and extended run times typical of LP-fueled equipment.<\/p>\n Technically, the CH730 platform utilizes an Overhead Valve (OHV) design which improves volumetric efficiency and thermal management compared to older side-valve designs. The engine block is constructed with cast iron cylinder liners, providing exceptional resistance to wear and deformation under thermal stress. A full-pressure lubrication system, complete with a spin-on oil filter, ensures critical components remain lubricated even during operation at variable angles or under heavy load. The “elec” designation indicates an electric start configuration, integrated with the welder’s existing battery and ignition systems.<\/p>\n