Well, here's the deal.. Last night I took the mower deck off my rider, sharpened the blades, re-attached them, made sure it ran fine, which it did, worked like it has been for the past 3 months, parked it in the tarp shed and went inside. Well this is what really really made me snap. I was happy with it because I just fixed the tire and thought "Thank fuckin god it's back and working again" as it had sat up on cinder blocks for the past 2 weeks due to flat tires. Morning comes, beautiful day out, grass to mow. I go to start it, takes a few times (I thought it was odd, but didn't think much of it) and get it started. Well some past history first, this machine was fixed at a mennonite repair shop a year ago or so because apparently there was a peice of dirt stuck in the hole that a supposed pin drops into when the machine shuts off to stop the gas flow from going into the engine when it's off. They put a valve on the gas line aswell, well after that, it never went down all the way on the throttle or it would just stall. Well this morning, it seemed to be completely the opposite, it idled fine at the lowest throttle setting (I had a really confused look at the time) and at full open, it ran horrible and the whole frame was shaking because it was going up and down (the reving I mean). I tried to cut grass with it, and it goes for about 5 meters and then nearly stalls (still hasn't for some reason, but just barely) and then starts running again and spews out a shitload of smoke for a few seconds. I tried to "run" it off and it didn't even drained the gas and put new gas in, that was a wasted $10 trip to the gas station.As of now, it's sitting out in my yard, I don't want to touch it because it's pissed me off enough. Also, I took the air filter off and it seems that at one point it was spewing gas up out of the air inlet. Can someone please help me?!? I need this machine running as I cut grass for people. I vowed to myself I would permantly park this thing if one more thing broke, but it's getting it's last chance.** Forgot to add, it's a 12hp brigs and straton (type H I think?), and manufactured by murry (I know..sad).Second update:Uhhh...it appears to be fine?? It ran ok today, a bit touchy, but it seems ok, can someone care to explain how the hell this happened????!?, scrap that, it's fuxxored again. Arg, I need it for my lawn cutting needs!