Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F6-11631-00 STD Viewer:872 OEM No. : 6F6-11631-00-STD For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 64D-11605-00-00 0.50 Piston Kit 6H4-11635-01 0.25 Zinc Anode 6CE-45373-ZN Lower Unit Lube Oil Pump 256-63152-00