What is the fuel line routing for a primer bulb?

Answer 1

The fuel line routing for a primer bulb typically involves connecting the fuel line from the fuel tank to one side of the primer bulb, and then connecting another fuel line from the other side of the primer bulb to the carburetor. The primer bulb acts as a manual pump that helps to draw fuel from the tank into the carburetor to aid in starting the engine. It is important to ensure that the fuel lines are properly connected and free of any kinks or blockages to ensure proper fuel flow.

Answer 2

Most primer equipped carburetors use a diaphragm equipped with flapper valves in between the primer and carb. This allows fuel to be drawn through from the fuel source one way, then pushed through to the throat of the carb the other way. Most primer system failures are due to this diaphragm being torn, pinched shut, inflexible, etc.