Fuel puddle bleed shut-off for fuel injected two cycle engine

Claim 1

A marine fuel system for a two cycle crankcase compression internal combustion engine having a piston reciprocal in a cylinder between a combustion chamber and a crankcase, an induction system supplying combustion air to the engine and fuel injection means mixing fuel with the combustion air, and having a fuel tank, said fuel system comprising fuel pump means connected to draw fuel from said fuel tank and supply fuel under pressure to said fuel injection means, pressure regulator means regulating the output pressure of said fuel pump means at said fuel injection means and returning excess fuel through an excess fuel return line to said fuel pump means for recirculation, a puddle removal system comprising a puddled fuel return line having an inlet connected to said crankcase and receiving puddled fuel including heavy fuel ends, and having an outlet connected to return puddled fuel to said fuel pump means for recirculation, wherein substantially all of the fluid flow in said puddled fuel return line from said crankcase is gaseous at high engine speed, and is more liquidic at low engine speed, a shut-off valve in said puddled fuel return line and having a closed condition at said high engine speed blocking said gaseous flow from said crankcase through said puddled fuel return line, and having an open condition at said low engine speed permitting fluid flow from said crankcase through said puddled fuel return line.