Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 664-11610-10 0.25 Viewer:684 OEM No. : 664-11610-10-0.25 For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Kit 689-11635-00 0.25 Piston Kit 6L1-11642-01 STD Piston Kit 700-878573A2/878573A 2 0.030 Ring, Cross Pin 6E5-45633-01-00