I have to agree with others, if it's getting worked, it's at WOT. Mowing, pushing snow, tilling, throwing snow, plowing.... etc, its wide open (~3600). I do this with the 14's and 16's, and Dad does it with his M18 in his 782. We get into the 1,000's of hours before they need any love, and normally it's just a new rod, piston and rings due to ring wear. Check the gas and fill the oil...... the only time I don't run WOT is moving them around, no load. Loading on the trailer, moving in or out of the garage, or hopping off to move something while using it... With the 14's and 16's, they run a bit smoother at WOT.