Small engine primer bulb with hose, large diameter. If the engine does not start the primer bulb may be defective and unable to draw additional fuel in to the carburetor to assist with starting the engine.
Fuel line. The fuel line allows fuel to travel from the fuel tank to the carburetor and from the primer bulb to the fuel system. If the fuel line is leaking, replace it.
Zama carburetor rebuild/repair kit. If the carburetor is clogged, the engine won't get enough fuel. As a result, the engine may not start or may run rough. It is often possible to repair the carburetor if it is clogged.