For some strange reason people do not want me to use the 36" on their lawns I have used it when no one is home and on large lots......for the most part it stays in the trailer, I pulled it out today and mowed the back yard, as I came close to the a/c unit I thought if I wasn't paying attention I could wipe that unit off its slab////has lots of power,etc..., I then switched to the 21" for some parts of the yard that the 36" couldn't get to...wife gets home and asks when was i gonna mow the rest???It was already done with the 36"??? I then went over the rest of the yard with the 21" and she came back out and said it looked nice?? Its starting to bug me that the 36" isn't what I thought it could be.....I'm lost??