Originally Posted by ricky86
If it has a vapor recovery system, it could be getting pushed up through there.
It does have one and I shortened it's height (where the carbon filter sits) by about 4 inches when I removed the (useless except to increase the cost of the mower) rollbar it was inserted into. Although it seems like I would have seen this problem more frequently than just in the last few weeks if that were the source of the gas? I did all that right after I bought the machine 8 months ago.