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1979 85 hp evinrude gas to oil ratio?

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  • 1979 85 hp evinrude gas to oil ratio?

    What is the gas to oil ratio for a 1979 85 hp evinrude outbard boat motor?

  • #2
    Re: 1979 85 hp evinrude gas to oil ratio?

    50/1 tcw-3

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    • #3
      Re: 1979 85 hp evinrude gas to oil ratio?

      Thank you. The person I got the boat from said 40 to 1. I am a little virgin to boating. What is tcw-3?
      Last edited by Jim d; June 10th, 2010, 02:08 PM. Reason: misspelling

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      • #4
        Re: 1979 85 hp evinrude gas to oil ratio?

        TCW3 is the current spec for a two stroke outboard engine oil. TC = two cycle W= water cooled. 3 is the current spec, the previous one was 2.


        Would not hurt to run 40:1 but not necessary

        50:1 is near enough 1 pint in 6 gallons

        20ml per litre if you are where litres are used. (The rest of the world outside the USA)

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        • #5
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          Re: 1979 85 hp evinrude gas to oil ratio?

          Thank you. I will get a manual.

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