My father has a late 80's Honda HS55 snowblower with GX140 engine. I typically make sure all is well with it before the winter season. This year I noticed if I left the fuel shut-off in the ON position and left it overnight, the next time I tried starting there was a large amount of fuel coming out of the exhaust. Once it gets started it runs beautifully without any issues. Before doing any of the work, I removed the carb and completely disassembled and made sure everything was clean. I am stumped. Any help would be appreciated.