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75 hp yamaha 50/1 or 100/1??? its a 1995

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  • 75 hp yamaha 50/1 or 100/1??? its a 1995

    I just got a boat today. the guy told me to run 50/1 yamalube. When I looked at the yamaha gas tank(which could have been from another boat) it said mix 100/1? do you all know anything? im takin it to the water tomm. Let me know somethin asap. I dont wanna burn it up on my first day out on it. Again. Its a 1995 yamaha outboard. 75 hp. Grey body/white prop. THANKS!!!

  • #2
    Re: 75 hp yamaha 50/1 or 100/1??? its a 1995

    50/1.

    Some makers authorized 100:1, for a while. They, later, found that the 100:1 did not leave enough residual lube on critical surfaces during lay ups.

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    • #3
      Re: 75 hp yamaha 50/1 or 100/1??? its a 1995

      Originally posted by DJ View Post
      50/1.

      Some makers authorized 100:1, for a while. They, later, found that the 100:1 did not leave enough residual lube on critical surfaces during lay ups.
      That was OMC. Current Yamis use 100:1. Don't know when Yami made the switch, though.

      Use 50:1 now, then research it with your local dealer. Too much won't hurt.
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      2017 Boston Whaler 150 Montauk & Mercury 60 ELPT Command Thrust & Merc 3.5 Kicker
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      1960 Mulray 100 Dinghy, equipped with Beaver Oars
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      • #4
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        Re: 75 hp yamaha 50/1 or 100/1??? its a 1995

        Originally posted by JimS123 View Post
        ...Current Yamis use 100:1. Don't know when Yami made the switch, though...
        I have a 1985 5 horse Yammy that's 100:1, so if they switched, it was a while ago. Definitely agree, though, default to more oil rather than less until you can be sure.
        Dang - I cut it three times and it's still too short!!...
        2004 Scout Dorado 175 Dual Console
        Yamaha 90 4-Stroke

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