Engine fuel system with a fuel vapor separator and a fuel vapor vent canister

  • US 6,553,974 B1
  • Filed: 10/24/2001
  • Issued: 04/29/2003
  • Est. Priority Date: 10/24/2001
  • Status: Active Grant
First Claim
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1. A fuel supply system for a marine propulsion device, comprising:

  • an engine having a crankshaft supported by said engine for rotation about a generally vertical axis;

    a first fuel chamber having a first inlet conduit to receive liquid fuel from a fuel storage tank, a first outlet conduit connected in fluid communication with said engine, and a first vent for allowing fuel vapors to flow out of said first fuel chamber;

    a second fuel chamber having a second inlet conduit connected to said first vent of said first fuel chamber, said second fuel chamber having a second vent for allowing fuel vapors to flow out of said second fuel chamber; and

    a valve, associated with said second vent, for blocking said second vent when liquid fuel within said second fuel chamber exceeds a first predetermined amount.

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