My 720 misses, bogs down and stalls after it gets warm/hot It's been in the local bobcat shop for 6 weeks, they have replaced/tried numerous items and finally admitted they have no idea what is wrong with it. They have done the following: replaced the fuel filter cleaned the air filter new distributor cap and rotor I believe new points and condenser placed spacer valves under the carb adjusted the timing new ignition coil I'm at a loss as are they.....any and all suggestions would be appreciated. Thanks in advance