Genuine Briggs & Stratton 495606 Carburetor Rebuild Kit. If the engine is running poorly then the carburetor may be restricted and need to be cleaned and some of the internal seals and diaphragm replaced.
Tube-pick up (uses spring clip)
Tube-pick up (uses spiral pin)(1/4" long)
Spring Cap Between Spring and Diaphragm
Needle Valve, 3-5 HP Horizontal & Vertical (Pulsa Jet Carburetor)