Why does a hot start work better than a cold start?

Question

Also, does this apply to all engines? Are there some that can be started better when they are cold?

In: 2

Answer 1

The fuel vapor in an ICE will condense on the cold cylinder walls of the engine, leaving the mixture too lean to burn properly (which is why a choke enriches the mixture to compensate). This isn’t an issue when warm. If the fuel injection/carburetor is set up properly, it shouldn’t be that hard to start under either condition unless they are extreme.