Cheap And Discounts Outboard Motor 677-11631-00-96/97/98 677-11630-00-00 STD Piston Set with 647-11610-00 Ring for Yamaha 5HP 8HP, 50mm STD Wholesale. Buy Directly From Merchant SouthMarine Engine Parts Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.