Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 664-11635-00 0.25 Viewer:1305 OEM No. : 664-11635-00-0.25 For YAMAHA Outboard 20, 25 HP You May Also Be Interested In Piston Kit 6F5-11636-00 0.50 Piston Kit 689-11635-00 0.25 Bearing 93341-41414-00 Carburetor Repair Kit 61N-W0093-00-00