Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 664-11610-10 0.25 Viewer:675 OEM No. : 664-11610-10-0.25 For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Kit 6H3-11631-01 STD Piston Kit 6L1-11646-01 0.50 Washer, Special Shape 90209-18112-00 Gear Assembly, Starting 689-81807-12-00