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  1. #1
    Join Date
    Jan 2010
    Location
    Tuncurry, NSW, Australia
    Posts
    89

    Default What mixture please.

    Hi, i have just inherited a 1980 4hp Mariner 2 stroke outboard, i've been told to use 50 to 1 fuel mixture. Would this be correct please?

  2. #2
    Join Date
    May 2013
    Location
    TX.
    Posts
    264

    Default Re: What mixture please.

    Yes. Half pint of TC-W3 rated two cycle outboard oil to 3 gallons of 87 octane or better gas. On an '80 might try to run straight gas or surely not more than 10% ethanol. I don't know when Merc upgraded it's rubber to resist alcohol. But I do know that they aren't rated for more than 10%; at least mine isn't and it's a 2002.

    Mark

  3. #3
    Join Date
    Jan 2010
    Location
    Tuncurry, NSW, Australia
    Posts
    89

    Default Re: What mixture please.

    Thanks Mark, i thought so i just wanted to make sure. Thanks again for your quick response....

    Warren.

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