Just got my mower back from the shop. New trigger switch, carb rebuild, filters all around, new plugs and coil. Ran great for a couple of hours. Now it "hunts" at all speeds except wide open. Choking it will even it out a bit. Running under full load (mowing) also helps. It seems like a governor type problem. I read a thread that talked about adjusting the governor spring. Where is this and how do you adjust it? Or, could it be the high speed jet? I haven"t tried anything yet, it is just as it came back from the shop.
Thanks in advance for any advice.