Piston Ring Replacement??

If you are looking for the standard bore ring set the are 594437. The part no you posted is for .020 over size piston.
 
Hello I had that same engine with the same problem. One of the valve’s got stuck open on the heads as well.
That’s the engine that they paid a settlement on it. I end up junk it and replacing with a B&S 19 hp. Good luck with it.
 
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