walk past my truck and smelled gas today. but not truck gas, an oil mix. so i looked at my mowers and noticed one of my lawnboys had a trickle of gas coming out of the front of the muffler, puddle on the deck, then a puddle in the truck. i tilted it forward to see if my fuel lines came loose, and gas poured out of the muffler. why and how the hell did that happen??? i let it drain out, then tried statring it. it took a few pulls, but started. any ideas on what this could be?