Yamaha - Nut Castle - 90171-14031-00 MerCruiser-4-5L-MPI-Bravo-2012 Optional and removable check valve

Optional and removable check valve included

and shallow-water surprises while staying light enough to reduce drag and improve engine efficiency

responsive satellite data

Part-number-specific fitment – supports accurate ordering when 61A-W0078-A4-00 is listed for your engine

Yamaha - Nut Castle - 90171-14031-00 MerCruiser-4-5L-MPI-Bravo-2012 Optional and removable check valveYamaha Nut Castle 90171 14031 00 Made from the highest quality materials to last for years to come, Guaranteed to meet the highest standards of quality and durability, Designed to withstand the toughest abuse, Genuine OEM Yamaha part, Special Order Item. 90171 14031 00 NUT,CASTLE WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information