SuziQ, if you have a gas can, just use that. As long as the hose to the carb is full, you can test run the engine by keeping the gas can above the level of the carburetor. A gallon can will probably run the engine for an hour. Early automobiles (Model A for instance) used gas tanks mounted in the cowl above the carburetor. Gravity works pretty well, actually. No need for a pump at all.
