Replacement fuel pump for discontinued Mercruiser pump found on Cool Fuel systems. Mercruiser Electric Fuel Pump | Sierra 18-35433 Replaces cool fuel pump discontinued by Mercury service bulletin 2004-05R1 One end is threaded with the other end non-threaded Fits many V6 & V8 Mercruiser applications Replaces Mercury 861156A1, 807949A1 Replacs Mallory 9-35433