I am actually looking for piston rings for a 1953 Gale Sea King 3 hp. Model 35GG-9004B. The original part number was 550-314. I saw on this forum that this number converted to 593425. As Gale was a division of OMC, the parent company of Johnson/Evinrude, I thought maybe the parts for a 3 hp in 1953 may be interchangeable.
My parts guy says that the 593425 is a good number for rings, he just can't verify for what motor/bore/hp...Thats the reason I was looking for the parts numbers.