JW51 I would not term your hot start issue as vapor lock. In your case (and I am sure others) the short shut down heat build in the carburetor is pushing fuel vapor into the air intake system causing the over rich condition that is cleared by increasing the air those fuel vapors are mixing with by opening the throttle.
A true vapor lock condition is created when there is a portion of the fuel delivery system (typically the fuel pump or carburetor) is hot enough that the fuel vaporizes in that location. If it is the fuel pump the pump can not pump vapor because it is compressable, so no fuel is delivered. If it is the carbruetor the fuel vaporizes and is released through the vent system and there is not enough fuel delivered through the metering systems to run the engine. This can also happen in the fuel line, typically between the fuel tank and the pump where the fuel is under vacuum from the pump suction. One of the reasons in tank pumps are used, they only push fuel under pressure, they do not pull fuel creating that vacuum condition.
