Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11635-00 0.25 Viewer:871 OEM No. : 679-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 61N-11604-00-00 0.25 Piston Kit 6H1-11635-03 0.25 Gasket 27-803663020/803663020 Oil Seal 26-803514/803514