Dedicated Propane Powerplant Goes in New Exmark Professional Mowers
Mar 12, 2013
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Exmark Manufacturing has launched its new propane zero-turn riding mower through its nationwide dealer network. The Lazer Z S-Series uses a Kohler propane EFI powerplant, engineered for improved starting, stronger performance, and reduced fuel consumption.

"Commercial landscapers who have adopted Kohler's EFI technology are documenting 25% less fuel usage than comparable carbureted engines," said Brandon Fredricks of Kohler Engines. "This, combined with the landscape company's ability to negotiate wholesale prices for propane fuel, will allow landscape companies to achieve a much lower cost of operation not previously attainable."

That, the company said, enables landscape professionals to use propane as a green alternative as well as a competitive advantage.

Better fuel efficiency enables the mower to operate up to 7.5 hours on one tank of fuel. The one-tank system is designed for better balance--and thus improved handling--than competitive two-tank systems, which are often outside the mower footprint.

The Kohler powerplant is the first dedicated, propane-fueled EFI engine package that operates without conversions or aftermarket systems. The automotive-style closed-loop EFI system optimizes air/fuel settings based on exhaust output, in real time, to maximize performance and efficiency while minimizing emissions and eliminating carburetor-related issues for the life of the engine. The ECU-controlled start-up simplifies the sequence and eliminates the need for a choke.

Fredricks said the improved fuel economy of Kohler's closed-loop propane EFI engine delivers the lowest operating cost for commercial landscapers. It is also designed for improved turnkey startability compared to carbureted propane models, most notably in lower temperatures.

The company said that Propane Education & Research Council incentives help landscape contractors get cash back on propane mowers.

"Through the PERC incentive program, qualified buyers can get up to $1,000 back on each new propane-fueled mower, up to a maximum of 25 mowers, in return for a season's worth of data about fuel consumption, hours and maintenance," Willis said. "The Kohler engine propane EFI engine has its roots in the PERC research and development program. Working with Exmark to encourage widespread adoption of its products featuring the engine is the next logical step."

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