Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 669-11631-00 STD Viewer:1260 OEM No. : 669-11631-00-STD For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Ring 6R5-11603-00-00 STD Piston Ring 675-11610-20 0.50 Slide, Shift 6H1-45634-00-00 Propeller 48-828154A12/828154A12