Hedges is correct but I want to be somewhat pedantic and clarify. Carburetor's mix air and, well, nearly universally,
liquid fuel to create vapor capable of exploding in a sealed chamber: causing the moving of pistons, etc. through the very venturi process described.
Without the creation of such vapor our liquid fuel would burn more than explode. Fuel injectors do the same thing although they're not likely found in most liquid fuel using generators, rather automobiles.
But use a gaseous fuel like propane or natural gas and there is no need for a fuel injector or carburetion. IMHO these are the best fuels to run a home generator on. Industrial generators, where pollution can be controlled with industrial equipment, given the stability of the fuel and the reliability of such engines are best in mission critical sights like hospitals.
Gasoline has limited shelf life without stabilization (6 months), it can gum up the generator over time, it requires more refills and more storage of fuel (as the gas station down the road also out of power can't help you) and is smelly/dirty.
The downsides to propane and natural gas are that they carry less BTUs per volume that gasoline, but this is usually not an issue at the home generator level of operation.
US Carburetion: whose products I've used and like, but I have no affiliation with, sells kits to convert big box store generators that run on gasoline to run on propane, natural gas or gasoline.
https://www.uscarburetion.com/
Finally, somewhat off topic, but if you plan on being able to crank a self starting generator, put a trickle charger on the battery that cranks it. This can invariable be on an electric line not energized by the generator as most generators charge their crank battery when they run anyway.