HI group: I have a 910 E and as I was cleaning it from a lot of work a black cap / cover came off the gas tank vent. I think it came off as a black piece went flying when I hit it with some compressed air; and now it bogs and will not stay running and if moved the wrong way gas spills out. So I am asking if anyone can help as I have looked all over and tried to find this cap with no luck. I did find a filter piece but that is not what I am looking for. ANY HELP would be GREAT Thanks a ton. It starts right up like high speed and dies and then will not start until it sits for quit awhile.