Sick push lawnmower. All the facts follow to aid in your deduction (and to help me get my troubleshooting straight in my head). I'll hold my tongue on my thoughts for now and hear what everyone says first. Bought it used, from a lawnmower repair guy. When I picked it up it started for the guy on the first pull. I've been mowing the lawn with it for months and it has done me well. Then a couple weeks ago the lawn got away from me. I was out of town the weekend I wanted to mow and it rained too hard the next weekend. On Tuesday or Wednesday I realized the lawn wasn't going to wait until Saturday and I went out and mowed the bastard. I had to mow in half-passes--leave about half the cutting deck on grass that had already been cut. Even so, the mower was struggling and died a couple times. I started "clunking" the thing at the end of every pass to break loose all the grass that was building up inside the deck (sorta like a lowrider at a stoplight). Well eventually it starts to sputter like it is choking so I stop pushing, but it doesn't recover, it keeps sputtering and dies. I flipped the thing over and cleaned out all the grass. At that point it would start when I'd pull the cord, then it would sputter out and die. I fucked with the hose from the tank to the carb. I fiddled with the spring linkage to the carb. I monkeyed with the cable from the deadman's switch handle--all with no real results. I let it sit for awhile to cool down, thinking it might be overheated. All with no luck. I'd prime it with the little pump bulb and it would start right up, run a few seconds, and die. Eventually it just started up and started working and I finished the lawn. Well today I mowed a bit before the thing sputtered out and eventually died. It was out of gas, so I picked up some gas and hoped that was it. It wasn't. Now I couldn't get it started by futzing with it. If I prime it, it'll start up and run for a second or two. If I flip it on its side to look under it it'll run for 4-5 seconds when I right it again. Thoughts?