That's quite a busy looking carburetor isn't it? It's got more diaphragms than a regional planned-parenthood rally.
OK you washed down the inside of the carburetor. Gook, gunk, snot, pieces of pedestrians, all got sucked into the engine.
And scorched themselves right on what used to be sparking plugs (now they're just plugs - nearly inert, I gather...)
You're savvy enough to remove the spark plugs without getting their wires crossed,right? Remove the plugs and look at the inside the engine part of the plugs. There is supposed to be a well tanned porcelain tower in the bottom. With a steel tip inside that. If the porcelain isn't tan colored but shiny black you found your problem, At least you found the first one. Don't bother trying to clean them. That's as pathetic a waste of time as trying to rebuild a light bulb.
Go to the auto parts store. Purchase new spark plugs and...and...and...
A two foot length of very cheap to buy vacuum hose. You'll know it's the right size if you can push it over the spark plug wire tip nipple.
Go change your spark plugs.
That carburetor as mentioned has A LOT of diaphragms. Look closely and you'll see the steel barrel nipples sticking out of the carburetor that the rubber vacuum hose plugs into. The hose other end plugs into (you guessed it) a diaphragm. Disconnect that hose there and not the carburetor nipple end. Plug in your new hose. Aren't you glad you got two feet instead of two inches?
The hose is plugged into a diaphragm. Suck on the free end of the two foot hose. Do you feel the suction air choking off? That diaphragm does not have a leak. Remove the test hose, plug in the original hose after checking to make sure the outside doesn't have any holes or cracks and has not gotten hard like plastic. If it has, shorten the length of your new hose and plug in the new hose.
Move to the next diaphragm and repeat. There should be no air leaks. Tight vacuum in all the diaphragms. If you run into a bad one, take a picture of it with a camera or phone and take it to the auto parts and get a new one.
Are we at thirty dollars yet?
Good hunting and report back. I have the notoriety of squeezing every peso so tight the Aztec farts.