Hi,
I have a weedeater one riding mower. The engine rans fine but it seems the wheel locked up and the mower won't move. Last week when it happened, I had to take out the wheel key to push it back to storage. Today I was able to start the mower, and used the mower for about half hour, then it happened again. The reverse still worked, but the forward was difficult.

Anyone knows the reason for the problem and solution? Thanks.