Does anyone know if the GF1800E mower has a height control on the lift lever? Can you have the mower hold a mow deck height, say if you're mowing taller grass without the front mower wheels touching the ground? The manual does say you set the mow height by adjust the front wheel height, but says nothing about the lift lever. My primary interest is for the mow deck to hold at a particular height so I can mow taller than 4" grass. I know on my BX2230 I can have a brush hog hold above the ground for prolonged periods while mowing (but will eventually come down over time).