X2 on what Josh said above and I said in my first post. You HAVE to keep it clean. The internals of the pump will not tolerate any dirt, trash, germs, diseases.....etc... I'm sure you get the picture.

That said, did you read on my site where I did the drive shaft seals? To get the throttle shaft out your going to have to remove the face cam and the guide stud in the mini-max governor assembly just as I did. Note how I marked them in my disassembly. If ya do that, you can put them back exactly where they were and you should be fine.

Those are the only 2 settings that I believe you will be messing with.

Good luck and let us know how it goes. It sounds like you have mechanical abilities, so if you take your time everything will turn out ok.