Noticed gas coming out carb float overflow?? rubber hose from carb. that I assume was from stuck float. It would just drip a few drops nothing major for several months but mower ran fine and then it increased to the point where it wouldn't run, flooding. I assumed float was sticking. Took it to a LMower shop and guy removed carb to clean and he said carb was in bad repair from sometime in past (I bought it used)so ordered a new carb and installed. Still leaks small amount and will run but cut off after a few minutes, guy said it was like it was getting to much gas. Can cut the fuel shut off valve off and will run OK until all gas is gone from carb. Would it be necessary to set float on a new carb? Guy still trying to figure out the problem. Any suggestions, thanks.