2003 Yamaha 225hp 2-Stroke Maintenance

[partsgooroo]

I bought a 2003 SF21 Skeeter Fishing boat with a 225hp Yamaha outboard. My question is besides the obvious water pump impeller, plugs, and oil is there anything I should be doing on this engine to maintain it before heading out this spring?
It starts and runs nice right now and would like to keep it that way if possible.
Thanks for any help.