Photo: Toro The Toro Co. has updated its line of Z Master Professional 6000 Series propane mowers by adding 27 hp Kohler Command Pro closed-loop electronic fuel injection (EFI) propane engines. The closed-loop EFI technology may help reduce fuel costs by up to 25% and require less maintenance when compared with similarly sized carburetor engines, the company said. "Landscape contractors want the advantage of a cleaner-burning and more efficient engine without sacrificing power and results," said Toro Marketing Manager Chris Hannan. "Our new propane mowers help reduce landscape contractors' carbon footprint with the same level of performance and durability professionals expect from Toro." Toro Z Master Professional 6000 Series propane mowers come standard with Toro's Turbo Force cutting deck in 60-in. and 72-in. widths.