Yamaha's official 100-hour Service Kit for models:

F150XB, LF150XB, F150LB.

This kit includes:

Bracket Anode and Fasteners, Lower unit Trim Tab Anode and Bolt, Inline Fuel Element and Gasket, Fuel Filter above VST, Woodruff Key, Water Pump Gasket, Impeller, Spacer 1, Drive Shaft Collar, drive shaft O-Rings, Water Pump Housing Cover, Water Seal Damper, Cotter Pin, Thermostat, Spark Plugs (4).

 To complete the recommended 100-hour service, Yamaha recommends changing both the Motor Oil and Gear Lube.