Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11636-01 0.50 Viewer:500 OEM No. : 6H4-11636-01-STD For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Pin 6G1-11633-00-00 Piston Kit 676-11635-00 0.25 Anode 676-45251-00-00 Jet, Main 676-14943-29-00