ID Cylinder Heads

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  • April 2, 2024 at 7:52 pm #286467
    HARRY D. NICHOLSON
    Participant

      US Member - 2 Years

      What do these heads fit ? Bore seems to be 2 1/4″, casting is 7″ tall, spark plugs are approx 2 11/16″ apart on centers. They appear to be interchangeable though the combustion chambers are slightly different shape. The blue one has casting number 302770 and it is stamped 10 on the bottom edge. The greenish one has casting number 320495 and is stamped 15 on the bottom edge.005
      006
      014stamped10on-bottomEdgeBlueHead

      April 2, 2024 at 9:33 pm #286472
      Michael
      Participant

        International Member

        Look like early OMC  9.9 or 15hp heads from the 70’s and early 80’s

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