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Old old lawn tractor It starts but does not

Old old White lawn tractor It starts but does not continue to run I removed the air filter and noticed a significant amount of gas coming out of one of a holes seeping back to the intake (I think its the intake) and eventually flooding out. I noticed that when I covered the hole with considerable pressure with my finger it continued to run. A pretty good amount of pressure built up from that first hole. upon removing my finger the engine floods and stalls out.
While running with my finger on the hole it has white smoke from the muffler. but does run. What does the white smoke indicate and how to I get the thing to run steadily. Oil just changed

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NOT A EXPERT JUST TRYING TO HELP,,,SOUNDS LIKE YOU NEED TO CLEAN CARB. OR REBUILD IT,,, HOPE THIS HELP

Posted on Oct 08, 2009

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My backstory is the lawn tractor was sitting in the garage with our car for two years and not used. I prepped it for long term storage, but failed to drain the carburetor of old gas, so the old gas gummed up the works (even with fuel stabilizer). When I did get it running (after changing everything listed above) a lot of smelly white smoke kept coming out, but as I let it idle in fast speed the engine strokes became more regular and the bouts of white smoke became fewer and shorter until the smoke stopped altogether.

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