Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11635-09 0.25 Viewer:473 OEM No. : 6H4-11635-09-0.25 Similar Number: YAMAHA No: 6H4-11635-00 For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Kit 688-11631-02 STD Piston Pin 6R5-11633-00 Pump, Squeeze 65770-90J11-000 / 65770-90J13 Piston Ring 12140-94400-025 0.25