Marine fuel pumps and carburetors have vents that discharge small amounts of fuel if the pump develops an internal leak or the carburetor float chamber overflows. While fuel discharge drips out of a car, in marine fuel pumps, it is lead back to the fuel pump or the carburetor so that the engine can consume it.
There are coast guard requirements for fuel pumps and other parts of a boat. To ensure that you are safe and that you are following coast guard rules and regulations, always use marine parts for your boat.
