Welcome to JUST ANSWER small engines, let me try to help you !! The fuel pump should be the component downstream of the carburetor. It will be external, either powered by the camshaft, or by a hose from the crankcase. It would help if you could find the engine numbers on the flywheel cover, usually around the spark plug area. You can install an electric, low pressure pump after the fuel filter and go direct to the carburetor, to fuel the engine.
Why would I install an electric fuel pump on an engine that already has a fuel pump?
Only if you can't make it work.