I just got an 18hp 8000w generator from my dad, he installed an lp wired in unit. It has only been run about 10 hours but it has been sitting 10 years. I tried to run it but noticed gas running out the carb. I cleaned the carb and jets, floats are good cleaned the needle seat as it was gunked and this was the problem. I noticed that when i took the carb off with the 2 intake runners attached, there was no gasket of any type between the aluminum runners and the cyl head. Should there be? Is it supposed to be aluminum to aluminum? I want to make sure before i put this back together. Also adding a fuel filter, surprised it does not have one.