Question about Ryobi 30 Cubic Centimeter Curved Shaft Gas Trimmer

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What is the correct fuel mix for the ryobi 790R trimmer?

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  • panilling9
    panilling9 May 11, 2010

    you will hear many ratios and many pros and cons

    here is what i use in everything i have that is 2 cycle (except outboard motor)



    40:1 3.2 oz of 2 cycle oil w/ stabilizer to 1 gallon of 89 octane fuel

    Have been using this for years before ethanol and after ethanol 10%



    noticed after ethanol

    had to ritchen carb.some.



    never had a piston burn,ring stick or cylinder wall score,yet



    maybe someone else will chime in and give their suggestion to help you decide

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  • 6 Answers

The window ratio should be fine between 40/1 to 50/1.

Reduce oil ratio by increase gas part if some unburned oil can visible from the exhaust.

Someone else could have a better voice on this matter..

Posted on Jun 24, 2009

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Posted on Jan 02, 2017

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