Patent ID: 6076509
Filing Date: 2000-06-20
Classification: F02B,F02M

Abstract:
A fuel supply apparatus of an outboard motor for supplying fuel to an engine of the outboard motor from a fuel tank through a fuel supply passage, comprising:the fuel tank in one-way fluid connection with the fuel supply passage, wherein the fuel supply passage includes a closed fuel feed loop portion;a fuel filter disposed along the fuel supply passage,a low pressure pump unit disposed along the fuel supply passage;a vapor separator for removing vapor bubbles in the fuel in the closed fuel feed loop portion and fluidly connected to the low pressure pump;a bubble discharge valve having a float, defining a vapor outlet for the vapor separator, and adapted to close when a fuel level in the vapor separator rises;a high pressure pump unit disposed within the closed fuel feed loop portion of the fuel supply passage; anda negative-pressure-opening type valve fluidly connected to a downstream side of the bubble discharge valve and adapted to open responsive to an intake negative pressure of the engine to discharge the vapor from the vapor separator.