If not getting a kit, might try spraying it out as is with carb cleaner. Stick the little snorkel into the passage at the top and give it a few shots (should see the stuff going into the carb throat.) Watch face, eyes, hands. Take off the bolt at the bottom, and spray that passage out like at the top. There is a little jet in there. Then button it up, clean up the low speed needle, and reassemble on motor. I would use the same gasket, maybe with a little gasket sealer (that black permalube gasket sealer, not silicone sealant). Give it a try.
Probably should not disassemble if you don't have a kit -- don't take off that little cap at the top without a kit because you will need a replacement. If it's still not right, can pull it off when a kit is in hand. If can get it running at a low idle, let it run for a while in the barrel. Keep a hose running in the barrel to keep the water fresh and the barrel filled. Monitor the engine temp, but otherwise let it run a bit -- can clean themselves out if no serious blockages. JMO.