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  1. #1
    nickflo7's Avatar
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    what kind of premix to run on a 94 sl 750

    hey guys just converted my sl 750 from oil injection to premix but dont know what kind of premix oil to run please help


  2. #2
    auto culto's Avatar
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    check the link
    http://www.greenhulk.net/forums/show...ht=slx+pre-mix

    thats running 40-1 mix seems a bit of a rich mix but thats what everyone seems to run with out developing engine problems

  3. #3
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    A good quality oil is fine at 50:1

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    nickflo7's Avatar
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    A guy here at a boat shop said 32:1 is that to low

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    Thats a lot of oil

  6. #6
    nickflo7's Avatar
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    4oz to a gallon?

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by nickflo7 View Post
    A guy here at a boat shop said 32:1- is that too low?
    PWC 2-stroke engines are not the same as 2-stroke outboard boat engines, in a number of ways. Beware info that comes from outboard engine techs who are not also knowledgeable regarding Polaris watercraft engines.

    Outboards typically do not go above 6000 RPM, for example. HP per cc is often lower, especially with the older outboards.

    Many guys will advise excess oil ratio in order to be 'safe', especially if they are unfamiliar with your engine. The more oil the better, they think. The problem is that excess oil causes problems too.

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    Causes problems like costing more money and polluting more.

  9. #9
    nickflo7's Avatar
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    so is 4oz to a gallon to much? i already mixed 5 gallons into the jet ski can i run the 5 gallons the run the 40:1

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by nickflo7 View Post
    so is 4oz to a gallon too much? I already mixed 5 gallons into the jet ski can i run the 5 gallons the run the 40:1
    It is just arithmetic, simple ratios.

    For every ounce of oil, you want 40 ounces of gasoline. How many ounces in a US gallon?

    For every 40 gallons of fuel, you want 1 gallon of oil.

    How many ounces of oil are now in your fuel tank (mixed into the fuel, of course) but how many ounces of actual oil are in there?

    How many ounces of fuel do you need to make 40:1 given the amount of oil you already have in the fuel tank? Just take the current oil amount and multiply by 40. That is the amount of fuel you need to have in the tank to achieve 40:1 ratio.

    How many ounces of fuel are already in the fuel tank?

    Now, how many MORE ounces of fuel do you need to add to get desired the fuel quantity for 40:1?

    You can add raw gasoline to over oiled pre-mixed fuel tank to dilute the oil ratio down to the desired ratio. Once the oil has been mixed with some fuel, you can further dilute with more fuel as needed.

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