Toro Groundsmaster® (31698) 5900Description The Groundsmaster 5900 Tier 4 series mowers can mow up to 8. 4 hectares hour*. And to match the 16 foot (4. 9 m) wide mowing brawn and the 31% fuel saving^ gain with Tier 4 Yanmar 3. 3 L engine, the 5900 T4 series is loaded with intelligence. Smart Power allows the operator to effortlessly maintain the correct speed for optimal cutting, while the SmartCool system prevents over heating with auto reversing cooling fans. An onboard InfoCenter