Primer bulb. The primer bulb draws fuel into the carburetor to make the engine easier to start.
NGK Spark Plug (BPM8Y). 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.
Fuel tank vent (also called a check valve). The fuel tank vent allows air to re-enter the fuel tank. If the vent is clogged, the engine may stall.
Dual-layer air filter. This part has been updated; it now features a dual-layer design.
NGK Spark Plug (BPMR8Y)
Spark plug wire terminal
Gasket, fuel cap