The rear wheels completely lock up when attempting to pull it backwards about 80% of the time. A local Honda dealer has had this mower for close to 2 months now and in their own words, "we are clueless". A Honda rep was called in and recommended replacing pulleys and the belt. They said that fix made the problem even worse. When I bought this mower, I noticed that the left front wheel rides in the air when on a level surface. I should have returned it but didn't, as it didn't seem to affect the functioning of the mower. Is it possible that a mis alignment of the deck/wheels is causing the lock up condition? I last spoke with them 1 week ago and they stated that they were calling the rep in again, but I haven't heard anything back from them yet.