Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11636-00 0.50 Viewer:801 OEM No. : 679-11636-00-0.50 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 66T-11631-00 STD Piston Kit 688-11631-03 STD Key, Locating - Bearing Carrier 28-30281/30281 Key, Impeller Drive 28-56654/566654