New tractor, read the manuals but did not see a recommended engine speed for mowing. Being new, don’t want to run the engine too hard for a while. Seems not to lift the grass and give a nice cut all the time, mainly on finer grass blades. I’ve been cutting between about 2200 and 2500 rpm’s. Only 8 hours on it. Live in the country, sandy, slight hills and not good turf, except around the house. Mow about 3 acres.