i press the set button and it starts to rev up but then it goes back to idle, sometime i can do this a few time, but i seem to have to do it several times. once it warms up a little bit, its fine?? :confused: gets frustrating when i have to keep pressing it before it all of the sudden takes off?? :(

Mine will 'burp" after hitting the button, and then about the time I'm walking back to the house it starts to rev up to the preset idle.

yeah mine does that too when it works "normal". after the "burb" it will start to take off then its like it just turns off and goes back to normal idle.