It's crazy, but I have already done that. I also cut the top portion of the thermostat that goes from one point to the other. Something this old timer suggested I do. And yet this isn't doing it either. I'm tempted to buy a new carb as well as a new radiator cap. Two things I haven't changed yet. And I know it's almost impossible to be the carb but at this point I'm lost.
As far as the cap, I believe I'm running a 7lb but this motor recommends a 16lb.
