Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11635-09 0.25 Viewer:459 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 6R5-11642-01 STD Piston Ring 676-11610-00 STD Cable Assy 12019 Tab, Trim 6J9-45371-01-00