TomB

You need one kit per carb to have the gaskets and needle and seats for each. If the floats are plastic then replace them to be safe. May absorb gas over time and get heavier which throws level off. Ethanol can cause problems. If the floats are brass (2 stampings soldered together) then shake and listen for leaks that let in gas. If you hear anything replace. Unless you have an air compressor you should get a can of carb cleaner and a can of air (Staples etc. to clean keyboards). The carb cleaner to get rid of gum and the air to blow out all passages. Never stick anything in a passage. Take one carb apart at a time so you have an assembled one to compare in case you get stuck. Take apart carbs carefully over a bedsheet so dropped parts or springs can be found. Don't do it over a dirty garage floor. If the kit has no info on setting the floats then don't try to adjust them. Don't bend anything. Don't use any gasket goop or sealer on any gasket. Tighten attachment screws snug not crazy tight. Mixture screws should be lightly turned all the way in, then back out 1 and a half turns. With engine running and warm you can then turn in or out until idle is smooth. When carbs are off cover the openings with a towel to prevent dropping anything in. To build confidence rebuild one carb then run the engine. If ok then do the other. Good luck! It ain't rocket watchmaking.