Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F6-11635-00 0.25 Viewer:884 OEM No. : 6F6-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 6H4-11631-01 STD Piston Kit 646-11631-01 STD Pulser Coil 3G2-06022-0/3G2060220M Gasket, Housing to Powerhead 346354/0346354