:confused2:Hi guys, I have a model 104 Cadet, and put a 12 hp engine instead of the 10 hp that was original. now, I know that the engine has nothing to do with it but ever since that, I have noticed there is a very thin strip of grass right down the middle of the cut that I seem to miss. This tractor has 2-10" blades on the outside and a 20" blade in the middle. The blades are fairley new and sharp and it does not always do it. I just happen to notice a spot that is left uncut and have to go back and cut it again. Is there a reason that can explain this problem.