Scott-Atwater 3365

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  • August 17, 2015 at 12:58 am #2286
    archangel
    Participant

      Two part question: Can anyone tell me what kind of compression numbers I should be expecting when I test a 1956 Scott-Atwater 7.5, model 3365? And, does anyone know of a source for head gaskets for this model? I see that Laing’s sell a number of Scott head gaskets, but they don’t seem to carry any for the 7.5s and 10s, both of which are the gaskets I require, of course

      August 25, 2015 at 7:40 pm #22649
      jnjvan
      Participant

        US Member

        These are not high compression engines. They will run fine with 65-70 PSI. The highest I have seen for a 7.5 hp Scott is 80 PSI.

        You might try these guys for your gaskets: http://www.discount-marine-parts.com/

        John Van

        August 26, 2015 at 12:10 am #22666
        wiscoboater
        Participant

          Americanoutboards.com has a lot of scott/ firestone stuff. They might be an option as well.

          August 26, 2015 at 2:04 am #22681
          skeg
          Participant

            Not high compression engines is correct, however, even compression between cylinders is important. Close is good.
            Kevin

            August 26, 2015 at 2:31 am #22684
            Mumbles
            Participant

              P/N for your head gasket is 465-1882 if that helps any.

              August 26, 2015 at 10:54 pm #22730
              archangel
              Participant

                Thanks to all of you. If the compression numbers are normally that low I may not need the head gasket.

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