I have a Toro 20 which last spring I put away after running sta-bil thru it...got it out this winter, ran once and would not start again. I replaced the spark plug and put a new carb diaphragm in it...it starts, but won't stay running....any ideas ?
I had a similar problem this year and it would stay running with the choke on yet stall after turning off the choke. Turned out to be a few things. Bad spark plug, needle adjustment screw was missing, stuck float and stuck throttle. Its amazing it even started with all that wrong.