The condition known as Vapor lock is caused by fuel vapor and air collecting in various sections of the fuel system. The fuel system is designed to handle liquid fuel rather than a gaseous mixture. When a substantial amount og vapor collects, it interferes with the oporation of pumps, valves, and the fuel metering section of the carburator. Vapor lock is caused to form by the low atmospheric pressure og high altitude, by excessive fuel temperature, and by turbulence(or sloshing) of the fuel....