SEI MARINE PRODUCTS- Yamaha Water Pump Kit 65N-W0078-A1 115 150 HP 1998 1999 2000 2001 2002 2003-2005 This water pump kit replaces OE#: 65N-W0078-A1 and fits 115 HP (1998-1999), and 150 HP (1999-2005) Yamaha outboard lower units.