Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 664-11636-00 0.50 Viewer:1351 OEM No. : 664-11636-00-0.50 For YAMAHA Outboard 20, 25 HP You May Also Be Interested In Piston Kit 679-11635-00 0.25 Piston Ring 656-11610-22 0.50 Roller Bearing 31-818889A1/818889A 1 Gasket, Oil Pan 3AB-07402-0/3AB074020M