I have a 12.5 Tecumseh formula OHV. I pulled it apart, pulled the govenor off it and put it back together. Since then when I fire it up, it will idle a little rough but if I get on the throttle for more than 5 seconds the throttle will stick wide open and I have to hit the kill switch to shut it down. I can re fire it immediately and it will idle again till I get on the throttle again. Not sure if I have done something wrong or if I just need to rebuild the carb. Looking for any advice I can get. Thanks in advance.