Hey I have a gas forklift that when at start up runs fine, but as the unit heats up its idle becomes rough and stalls out. If you hit the throttle the unit will smooth out quickly. Then is you let the throttle go it dies back out again. I did notice that when running unit, i could close the carb and the unit would run smooth in idle but when i let it go it would be fully open and the unit would stall out. The type of carb on this unit is (Forklift Carburetor 16010-50k01 Ni16010-50k00 Fit For Nissan H20). Any advice would be helpful. Thanks.