Hi there
I am trying to help my son put a old tower trainer to 40 back together that someone had gave him we bought a new fuel tank for it and it has 3 outlets I know one goes to the carb and one is a fuel fill line but my question is the other one It has a old kb-40 and on the muffler there is a nipple for a hose does it go there And if so why? and do I need to block the line off to keep it from pulling fuel out with the vacuume of the exhaust any help would be great. Thanks