Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F6-11631-00 STD Viewer:871 OEM No. : 6F6-11631-00-STD For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 61X-11603-00-00 STD Piston Kit 676-11635-60 0.25 Gear, Reverse 43-882814/882814(28T) Carburetor Repair Kit 61N-W0093-00-00