- Clogged or dirty air filter: An obstruction can stop fuel from adequately moving and can cause gas to flow back up the air intake. Ensure regular cleaning or replacement of the air filter for efficient airflow.
- Float bowl needle valve damaged or stuck: In the carburetor, this valve manages the incoming fuel. Issues like misalignment or buildup inside can impact how effectively it shuts off airflow.
- Bad or damaged carburetor gasket: Improperly seated or degraded gaskets are potential areas for gas leaks, allowing it to spill inside the air intake instead of flowing properly.
- Carburetor overflow float stuck: When debris blocks or the fuel float fails, overfilling of the system and fuel flooding occur. This leads to excessive fuel in the intake instead of its designated flow.
