Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11635-09 0.25 Viewer:453 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 6G5-11635-00 0.25 Piston Ring 6H4-11601-00-00 STD Seal 315788/0315788 Cable Remote Control 701-48350-90