i have a 2006 hawkeye with a bst34 carb that runs like a bat out of hell on flat surfaces. get on a slight incline and it sputters like it not getting enough fuel. i’ve removed and cleaned the carb, floats are set properly, new spark plug, new fuel filter, new fuel, checked all lines, fuel and air for cracked or pinched line. any idea as to what i am missing? about ready to have a wienie roast