it wasnt running when i got it the rings on the piston were stuck i took the motor apart cleaned it repared it and put it back together then i replaced the spark plug and diaphram and i put a new pull cord and it ran fine for a day and when i came back the next day it would only run at full choke and with me working the throttle and it ran rough backfiring through the carb and air filter please help me with my problem

Logan, March 2010