Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 676-11635-00 0.25 Viewer:969 OEM No. : 676-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 6F5-11636-00 0.50 Piston Kit 6E3-11631-00-98 STD Forward Gear 69W-45560-00-00(24T) Gasket, Cover 655-12414-00-00