What is a common method for priming an engine not equipped with a priming pump?

Pumping the throttle several times is a common method for priming an engine that lacks a priming pump because it helps introduce fuel into the engine's intake system. When the throttle is pumped, the intake manifold draws in fuel from the carburetor or fuel injection system, making it readily available for the engine when it attempts to start. This technique is particularly effective for carbureted engines, as it creates a rich fuel mixture that aids in initiating combustion.

While activating the mixture control lever could influence fuel-air mixture, it is more typically associated with fine-tuning fuel levels rather than actually priming the engine for an initial start under cold conditions. Turning the engine over without engaging the ignition serves a different purpose, potentially clearing any residual fuel but not effectively priming it for a start. Positioning the throttle lever midway stabilizes the mixture during operation but doesn’t intrinsically provide the initial fuel necessary for priming. Thus, the act of pumping the throttle effectively compensates for the absence of a priming pump by ensuring fuel reach where it’s needed for combustion.