Newbie here, but was given this website as a link for some research and I hope someone can help me out. I have the above referenced mower and for some reason one of the 2 blades doesn't seem to cut as well as the other. This model has 2 21" blades and I just replaced them 2 weeks ago and the blade on the right doesn't cut the grass very well. It would appear that the blade on the right is VERY dull but that's just not the case. I have the mower set up to mulch but I would think if that's the problem both blades would be cutting poorly. I wonder if I could have a belt slipping or something that would cause the one blade to not be getting full power. Anyone familiar w/these mowers and if you can give me anything to check I'd appreciate it.