Carburetors are made of pot metal, which tends to have a high zinc content. Vinegar is an acid, and will damage the zinc. You should only use hydrocarbon solvents for cleaning carburetors.
However, it's important to use a non-corrosive cleaner which doesn't harm or degrade any plastic or rubber pieces on the carburetor. You should avoid using vinegar, because the acetic acid makes metal susceptible to rust.
Many people will simply use vinegar or even lemon water to boil clean their carbs. Chemical Carb Cleaners. These work quickly, and are incredibly toxic. Be sure to follow instructions, use PPE as much as possible and do in a well-ventilated area.
For example, to clean the insides of food-stained pots and pans, soak them in a mixture of one-half cup of white vinegar diluted with one gallon of water for 30 minutes. Then rinse in hot, soapy water. For use around the home, combine vinegar with water in a 1:1 solution to clean and freshen many surfaces.
Vinegar is made of acetic acid, which is a natural disinfectant for killing some common germs like salmonella and E. coli, but is best when used in tandem with antibacterial soap and water to guarantee all germs are killed.
Coca cola may clean you're carberator when it's off the car.Do not use it while its on the car. Coca cola contains sugar and will eat away at the valves and rings.
Vinegar/lemon juice will work well. The heat and water are able to get places that a simple spray can't. That and the acidic properties help loosen and disintegrate the gunk/varnish fairly well. I boiled mine for about 4 hours each carb and they came out super clean.
Carburetor cleaner is usually sold as a spray-on aerosol containing the following ingredients: acetone, methanol, ethyl benzene, toluene, and carbon dioxide—all of which help break down the varnish deposits that accumulate within the carburetor.
It is safe on for use on plastic, rubber, and most paints and metals, but it can react with some grades of aluminum and aluminum alloys. If you use this product and have an aluminum-based carburetor (which is quite common), please limit soak times to 30-60 minutes per dip with a maximum total soak time of 4 hours.
With engine running:
Spray down and around the carburetor throat to remove deposits from the throttle plate area. Do not spray down carburetor throat with engine off.
We've tried spraying carb cleaner and a vinegar soak, both with mixed results. A solution of pure lime juice or lemon juice turns out to work the best. Not only does it remove any remaining toilet cleaner residue, but it also leaves your jets smelling great. After the soak, dry the parts using compressed air.
Spray liberally with carb cleaner – trying to direct the cleaner into the jets – and leave to soak for a few minutes. Use an air line (or a can of pressurised air, sold as an 'air duster') to blow through the jets. Repeat the previous step and this one until you can see no more gunge.