* Diesel engines work on compression ignition. Instead of a spark plug igniting the fuel, diesel engines compress air to very high temperatures, which ignites the fuel when it's injected. Carburetors are designed to mix fuel and air for spark ignition.
* Diesel fuel requires a different delivery method. Diesel fuel is thicker and less volatile than gasoline. Carburetors rely on vaporizing fuel, which doesn't work well with diesel.
* Diesel engines have fuel injection systems. Diesel engines use high-pressure fuel injection systems to precisely meter and inject fuel into the combustion chamber at the optimal time.
In short, the fundamental principles of operation for gasoline and diesel engines are different, and a carburetor is not compatible with a diesel engine.
