So yesterday I took the wife for her first ride in the ol 50, no probs. Today I go out to take the kids for their first ride and the 235 knocks when I turn her over, then when she does start shes blowing smoke like crazy! I messed with the fuel screw on the Rochester to see if I could lean her out a bit which worked for a minute, but when I put the air cleaner back on she went back to smokin. Please help o Gods of the BOLT?!!