Primer bulb. The primer bulb draws fuel into the carburetor to make the engine easier to start.
Champion spark plug (RCJ6Y). The spark plug ignites the fuel and air mixture in the engine's cylinder to power the engine. If the spark plug is has fouled (if the tip of the spark plug is burnt or damaged), the engine may not start or may run rough.
Homelite fuel filter. If the fuel filter is clogged, it will restrict the flow of fuel to the carburetor. As a result, the engine may not start.
Homelite rewind spring (recoil spring) and container. If the rewind spring is broken, the starter rope won't retract.
Two-cycle engine intake manifold gasket. If the intake gasket is torn or damaged, the engine may run rough.