This engine ran very well for one year, but now it will not continue to run. It starts well after it has set for a day or so, but then is seems to flood itself out or something like that. The rpms never stabilize and after about 3 min. of running it dies. Maybe a carburetor problem. My mechanic tells me a bad carburetor, but i didn't think carburetors go bad. Might just need a rebuild kit. After it starts and begins to die, i tried pressing in the choke. This kills the engine. In my case, this was a gradual fail. I could tell something was going bad. At first, i could run 10k yards or so before it died. I did notice a compressed fuel bulb, but a replacement fixed the problem(not sure if it was related) Next time out i made it roughly 5k yards, died. It would start but not stay running. Now i cant get it off the trailer. Same thing, will start, idle rough, rpm will not stabilize, and die. U guys have any advice?

Thanks in advance

Im not sure if we all have the same exact problem, but any advice would go along way at this point. I'm pretty sure my mechanic is also in the dark.