Hi all!
I know this is an outdated post and although i have cleaned my carb before, i have so much going on i rushed taking it apart. Now, i have a stupid question but it will keep me from making a stupid mistake.
The diaphragm in the top of the carburetor and the slider needle that goes into the semi circular plate with the 2 screws and spring....what is the order of assembly?
Right now I have needle, white washer ring, plate with knob facing down, screws, and spring. i don't see a second washer.

I know this is an old thread but having just gone thru this, I thought this bit of advice was important enough to add here in case anybody else is using this thread as reference the future.

My advice is: before doing anything on this project, remove the battery and the battery housing (the metal box that surrounds the battery)!  I did not do this before removing the carb and I managed to get it out, but it was very difficult.  When it came time to put the carb back in place, though, I just could not do it.  Apparently it can be done but I found it impossible.  

Then I removed the battery and it's housing.  Oh my god, what a difference.  All of the sudden there is a way more space to maneuver.  I got the carb back in place in just a couple of minutes with minimal effort.  I really makes all the difference in the world.  I am positive it would have made a huge difference on removal as well. If I ever do this again, this will be the first step I do.  I am convinced this is the way it was meant to be done.

Removing the battery and housing is very easy to do as well.  You have to remove a few plates here and there before you can get to the 4 bolts holding the battery housing in place, but they're just simple bolts and screws.  It's basically just the process of taking the battery out to recharge it, plus those 4 bolts.  Altogether maybe 10 fasteners total to take off.  Can be done in 5 minutes or less.