Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 6H4-11601-10 0.25 Viewer:849 OEM No. : 6H4-11601-10-0.25 For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Pin 662-11633-00 Piston Pin 634-11633-00-00 Nut, Propeller 647-45616-00/647-45616-02 Washer, Plate 90201-30M00-00