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Old 03-02-2009 | 04:40 PM
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ckangaroo70
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From: London Mills, IL
Default RE: another darn ryobi post (ryobi performance modification, analysis and comparison)
I went out and found my plastic junk that I tore off my Ryobi. My Ryobi came off a string trimmer. Engine Family is YN4XS.0314RA; EM

I also believe it is a 725r model.

So folks can check theres against mine...mine is a 31cc with a Zama carb, and a single ring. About the only thing I can gather from the engine family number is the .031 which I assume stands for 31cc. Perhaps there is a website somewhere that explains these numbers, but as of right now I have not seen it. So I think it would be helpful if some other folks chime in with engine family numbers.
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