Toro has updated its line of Z Master Professional 5000 Series propane mowers with new closed-loop electronic fuel injection (EFI) Kohler Command Pro propane engines. These new models incorporate closed-loop EFI technology that improves fuel efficiency, features best-in-class starting, and can reduce downtime because the mowers operate without carburetors. Toro's updated line of EFI propane mowers can reduce fuel costs by up to 25 percent and require less maintenance when compared to similarly sized carburetor engines.