1. Fuel Supply Problems:
- Dirty or clogged carburetor: A dirty carburetor can restrict the flow of fuel, leading to sputtering.
- Blocked fuel line or filter: Check for any obstructions or kinks in the fuel line or a dirty fuel filter that may limit fuel flow.
- Faulty fuel pump (if equipped): A malfunctioning fuel pump may not deliver enough fuel to the carburetor, causing the engine to sputter.
2. Ignition System Issues:
- Spark plug problems: A worn or fouled spark plug can prevent proper ignition, leading to sputtering. Check the spark plug gap and condition and replace it if necessary.
- Weak spark: A weak spark from the ignition coil or faulty spark plug wire can also cause the engine to sputter.
3. Air/Fuel Mixture Issues:
- Incorrect choke setting: Ensure the choke is set correctly for the engine's operating conditions.
- Air leaks: Check for any loose connections, cracks, or damage in the air intake system that may cause an improper air-fuel mixture.
4. Engine Overheating:
- Restricted airflow: Inspect the air filter for clogs and ensure proper cooling system operation to prevent overheating, which can cause the engine to sputter.
It is recommended to consult the lawn mower's user manual for specific troubleshooting steps related to sputtering issues and proper maintenance procedures for your particular model.
