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Where can I purchase piston rings by size.

I am looking for (2) piston rings that measure 1 7/16 expanded diameter (for 1 3/8 bore) by .045 axial thickness by .06 radial thickness. That's about 36.5 x 1.2 x 1.5 mm.

they fit a Yardman ym71ss string trimmer engine. I've tried ebay , Jacks, and amazon and they either sell by part number or only handle certain sizes. Thank you.

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papa Hajek the YM70Ss should fit same size bore and stroke. Amazingly enough you may get the piston and ring assembly cheaper than just the rings. Check on here.

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