Hello new member hear. I have this lawnboy it has been a good mower with some usual issues a lawnboy has but its developed a new one and im not sure how to tackle it further. My wife used it two days ago and it quit on her in middle of mowing wouldnt start. This morning I replaced sparkplug cleaned out the air filter and added some higher octane fuel as well as some engine cleaner made by lucas. After a few pulls on the string it slowly gurgled its way into running fine however its spraying fuel out the gas cap. After saying something to my wife she said oh it was doing that when i was mowing the other day. So I did some checking couldnt figure anything out so I thought lets just take the gas cap off and start it and it started but the fuel is really churning inside like really churning dosent make since. Anyway I tried the one thing I could think of I replaced the gas cap thinking maybe it was a venting problem and it didnt help. Whatever it is is causing pressure to back up into the tank thats all I do know and I cant figure it out please help if you can. Thanks