hello. im still having some issues with my lawn boy 10304. Iv had the carb apart numerous times to clean it. iv removed all removable parts to clean them and I have a low rpm surge or hunt when it has no load on it. what else causes this? I love the mower but I don't have time to mess with it every time I use it. I checked compression and it has 120psi. are the governor springs common to wear out? is there anyway to set the governor rpm without a tach?