Join Date: Aug 2000
Location: Iowa City, Iowa
Thanked 0 Times in 0 Posts
Re: What does the fuel return hose really do?
Try searching on here about it, I know we were just talking about it the other day.
Just a brief overview, the return line, on a carbureted engine ,serves multiple functions:
Allows fuel to return to the tank, rather than over pressurizing and blowing the needle off the seat (with high volume/ pressure pumps).
Helps prevent vapor locking by allowing cooling fuel to circulate through the pump at all times rather than vaporizing in the lines and pump.
Helps reduce post fuel pump line pressure to help minimize wear and tear on the pump.