Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Remove the upper radiator hose, on the thermostat housing, and fill , to see if the coolant is coming through the thermostat . If it is, there is no air, and all you need to do is reinstall the hose. Or loosen the bolts on the thermostat hosing until you have coolant, then retighten the housing.
see question is still open, did you get system bled?