Home Forum Ask A Member 1960 Scott 7.5 Powerhead “Plumbing”

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  • #274007
    Buccaneer
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      US Member

      In putting on the new hoses on the powerhead today,
      it got me thinking more about “what” they all actually do.

      In looking at my “before” photos and the Scott manual hose diagram,
      I noted that the two hoses that plug into the two barbs on the
      port side of the base, were “switched around”.
      Not sure if that matters, but my Hiawatha parts motor matched
      the diagram, so I installed the new hoses as such.

      Anyway, from what I’m gathering from the diagram, I think I’m
      seeing that the top main bearing hose (G) is draining to the carb
      intake, and the center main hose (F) is draining to the powerhead
      base, and that the Manifold Scavenging hose (E) is sucking from
      the powerhead base into the one fuel pump port.
      Is all this seem logical? My first outboard with a diaphragm carb,
      and usually more modern of a motor that I mess with!

      Power-Head-Rubber-Hose-Chart

      Given all the plumbing above, why is the hose / drain system
      necessary on the starboard side of the motor, between the upper 
      main and the powerhead base?
      The Hiawatha parts motor with the same carb setup, does not
      have this hose.

      DSCN6457

      The whole nightmare of hoses……

      DSCN6455

       

      Prepare to be boarded!

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