It looks like you had a good time. Thanks for the photos. I am not sure what the best way to clean the motor is but DON'T use a power washer on it. A friend of mine used one and had all kinds of problems. I use a cheap paint brush to loosen the dirt and then vacuum it. I also use a spray bottle with water and then wipe it down. It is not perfect but it looks ok.
Ugh! I have been reading yes and no. Most likely will not use a power washer just because I'm paranoid HA. Thanks for the info.