Why does my lawn mower sound like its dying?

Answered by Douglas Hiatt

Why does my lawn mower sound like it’s dying?

There can be several reasons why your lawn mower sounds like it’s dying, and it’s important to identify the root cause in order to fix the issue. Here are some possible reasons and solutions:

1. Fuel-related problems: One common cause of a revving and dying lawn mower engine is a problem with the fuel system. Check if there is enough fuel in the tank and ensure it is fresh and not contaminated. Old or stale fuel can cause engine problems. If the fuel is fine, examine the fuel filter and fuel lines for clogs or blockages. Clean or replace them if necessary.

2. Air filter issues: A clogged or dirty air filter can restrict the airflow to the engine, leading to poor performance and stalling. Remove the air filter and inspect it for dirt, debris, or damage. If it appears dirty, clean it or replace it with a new one. Regularly cleaning or replacing the air filter is essential for proper engine functioning.

3. Carburetor problems: The carburetor is responsible for mixing fuel and air in the correct ratio for combustion. If it becomes dirty or clogged, it can cause engine issues. Clean the carburetor thoroughly, removing any dirt, debris, or varnish buildup. If cleaning doesn’t solve the problem, the carburetor may need to be rebuilt or replaced.

4. Spark plug problems: A faulty or poorly adjusted spark plug can also cause revving and dying of a lawnmower engine. Check the spark plug to ensure the wire is connected firmly and not loose or wobbling. If it is connected correctly, remove the spark plug to inspect it for corrosion or fouling. A spark plug covered in corrosion should be cleaned or replaced.

5. Ignition system issues: Problems with the ignition system can result in engine stalling or poor performance. Check the ignition coil, spark plug wire, and ignition switch for any faults or damage. Replace any faulty components as needed. Additionally, make sure the spark plug gap is correctly set according to the manufacturer’s specifications.

6. Mechanical problems: If none of the above solutions resolve the issue, there may be underlying mechanical problems with the engine. These could include issues with the piston rings, valves, or other internal components. In such cases, it may be necessary to consult a professional or take the lawnmower to a repair shop for a thorough inspection and repair.

It is important to note that these are just a few potential causes for a revving and dying lawnmower engine. Each case can be unique, and it may require some troubleshooting and experimentation to pinpoint the exact problem. If you are unsure or uncomfortable with performing these repairs yourself, it is always best to seek professional assistance to ensure the problem is properly diagnosed and fixed.