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Avoid operating the engine at low speeds. Doing so can lead to rapid clutch wear. In addition, slow-speed operation tends to cause grass and debris to wrap around the cutting attachment. (1) After starting the engine, pull the throttle lever gradually. The engine speed increases and the blade will start rotating. (2) When the throttle lever is released, the engine goes back to idle speed automatically. (3) Operate the machine at full throttle while cutting. Best fuel efficiency is obtained by re