Trash Picked Ryobi 25cc String Trimmer or Weed Eater or Weed Wacker. We will see what it needs and try to make a good again. How to fix your Ryobi string trimmer. Or about any other economy string trimmer.
I had issues with mine and my dads ryobi trimmers leaking gas. Both fairly new and low time. Fuel lines in new/ good condition. Disassembled and inspected. Found all 4 carburetor assembly screws loose on both trimmers. Tightened up and purring like a banshee now. Hope this helps you out.
It may be a plastic plug hides the mixture screw. If a plastic plug covers the mixture screw it can be pulled out for access. Not sure about a low speed mixture screw but it may be adjacent the purge bulb, deep in a slot in the metal plate that clamps down that bulb. If it is there it may have a plastic plug to cover and hide it too. Obviously the manufacturer wants any tuneup done at a shop or the mixture adjustments wouldn't be hidden and covered up. A small D tip adjuster tool may fit the mixture screws or it may be a small slot that a precision jewelers screwdriver will fit. I have seen others show a small D tip is what is on a Ryobi.
The U-bolts on your lift table probably have washers and nuts on the top side of the lift. If you remove those so you only have Nylok nuts and washers underneath then the U-bolts will drop out of the way when you don’t need them.