Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 676-11635-00 0.25 Viewer:990 OEM No. : 676-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 688-11604-A0-00 0.25 Piston Ring 676-11610-00 STD Housing, Bearing 6P2-45331-00-9S/6P2-45331-00-94 Impeller 688-44352-03-00