. OPERATION DETAILED CONTROLS AND GAUGES Blade Control Lever NOTICE 3 - 19 Fuel Control Lever This leve r (4) i s used to control the engine speed and output. (a) Low i dling: Push the lever fully. (b) High i dling: Pull t he lever fully. When digging o perations using the blade are continued for more than one hour, pay careful attention to the rise in the water temperature. This leve r (5) i s used to control the blade. (a) Lowe (b) Raise