Water pump impeller replacement 1992 30hp

[GrimesinMA]

What parts will I need to order to replace the water pump impeller on my 1992 Yamaha 30hp outboard (model 30MSHQ)? I don't want to miss something and have to reorder again later. Also, is there a resource that covers how to do this? Thanks in advance.

[boats.net]

order number 11 in this diagram 1992 30MSHQ Yamaha Outboard REPAIR KIT 2 Diagram and Parts
May also need number 18, 1992 30MSHQ Yamaha Outboard LOWER DRIVE 1 Diagram and Parts