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    gas mixture

    what is a normal gas mixture for a mid 70's johnson seshorse. IT IS A 15 hp.
  2. S

    what year is my outboard and what gas to oil ratio do i need?

    I have a 15 horsepower johnson, with the serial number E3993585 and the model number 15RL74S. What is the year of this outboard and what gas to oil mixture will work best?
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