Marathon Engine Systems
Marathon Engine
Marathon Engine ENERGY STAR Emerging Technology Award


Marathon Engine Systems was started in 1998 with the purchase of the Marathon engine from Briggs & Stratton Corp. The engine was originally designed as a long life power source for the Triathlon Heat Pump that was marketed by York International. This product was phased out in the late 1990's, but the engine found new life in other applications that could utilize its unique long life features. The original company focus started as parts supplier to the Marathon engines in the field, but has evolved to become a manufacturer of power generation products.

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Marathon Engine Assembly Line

Marathon Engine Systems (MES) currently occupies a 70,000 sq ft manufacturing facility in Southeastern Wisconsin. We have the resources to draw on the local manufacturing base in the Midwest for raw materials (castings, forgings, sheet, tube) as well as all varieties of machining and assembly. As was explained on our Home Page, we are an applications based company that designs systems for the distributed power industry... both prime and remote power. We sell our products globally and more than 3,000 of our engines were installed in a partnership in Germany - with PowerPlus Technologies that markets our microCHP (Combined Heat and Power) product throughout Europe. Our ecopower® won the 2011-2012 EPA ENERGY STAR Emerging Technology Award.

2008 Governors Award
Future Marathon Engine Testing

The outlook for microCHP, Distributed Generation (DG as it's known in the industry) and remote power is ever increasing. This expansion is fueled by the fact that as centralized power plants and power lines become more difficult to build, small power units at the local, or the commercial and residential levels are becoming more common. A significant part of the future for electric energy generation lies in Distributed Generation and energy efficiency. Because of our engineering and manufacturing expertise, we have the ability to react quickly to unique applications that develop in this rapidly growing and dynamic environment and will build on that ability.

Governor's Award