new experience for me today with this leaf blower... got carb cleaned real nice put it all back together and started it only ran on choke again decided to leave it running for a few to listen to what it does and i look over at it the muffler is red hot i run over and shut it down I put it on my work bench where the machine caught fire look to have started between muffler and block ran out side and threw it in the snow... so ya this one is beyond me unless its still carb related and that needs to be replaced