Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11635-09 0.25 Viewer:475 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 6D0-11636-00 0.50 Piston Ring 61U-11601-10-00 0.25 Roller Bearing 31-30895/30895 Gasket, Drive Shaft Housing 369-61012-0/369610120M