I have a hyster s60xm that has impco mixer and impco lp filter this lift is hard starting in the moring I have replaced the impco mixer with a new one and also replaced lp filter and replaced the vacuum hoses and it is still hard to get started but once you get it started that first time after that it will start up every time the rest of the day. The engine is a 4 cylinder mazda or gm not sure. need help. note also replaced the carb diaphragm.