Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 664-11636-00 0.50 Viewer:1357 OEM No. : 664-11636-00-0.50 For YAMAHA Outboard 20, 25 HP You May Also Be Interested In Piston Ring 61N-11604-00-00 0.25 Piston Kit 61A-11636-00/61A-11636-01 0.50 Carburetor Assembly 61N-14301-00 Gasket, Cartridge 688-44324-00-00/688-44324-A0-00