I can't find a carb for it, I bought a kit for the carb. but it didn't help. I have to block off some of the air filter holes for it to run. I have cleaned the carb twice and made sure all the jets are clear. Is it possible that it has a problem with a valve? it runs to lean, until it warms up good, and it's hard to start because the choke it stuck off and I can't get it freed up.