Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 664-11610-10 0.25 Viewer:687 OEM No. : 664-11610-10-0.25 For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Ring 64D-11604-00-00 0.25 Piston Kit 6L1-11646-01 0.50 Shim 12-8M0050438/8M0050438 Gasket, Upper Pump Case 369-65018-0/369650180M