My Toro 6.5 HP recycler mower was not running well. I'd start it and after anywhere from 10 seconds to a minute it would stop running. This prompted me to change the air filter and spark plug. Then if I let it warm up for a minute being stationary it was good to go for mowing the lawn. Today it stopped running while in use which prompted me to clean the carburetor. Still wouldn't start. The unit is about 7 years old. I'm debating taking it to a repair place, or trying any solution from the experts on this site or just replacing it. Thoughts?