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Troubleshoot Your Snow Blower: Is the oil level low?

You need to perform a Carburetor Adjustment. Drain the gas from your lawn mower our outdoor power equipment, then replace with fresh gas and fuel stabilizer to extend the life of your fuel. The carburetor regulates how air and fuel move through the engine. If your spark plugs look good, problems with your ignition system can also preventing a spark.

Do you have fresh, clean fuel in the tank?

Drain the gas from your lawn mower or outdoor power equipment, and then replace with fresh gas and fuel stabilizer to extend the life of your fuel. Valves that stick or have leaks can cause an engine to stop running.


Add oil to the engine. Check that the valve spring still has tension. Your oil needs to be changed every 25 hours of use or season. Is the engine emitting black smoke?

You can determine if your air-fuel mixture is off by checking the state of your carburetor.

Maintenance How-To

Is the engine dirty? A dirty carburetor can cause poor engine performance or starting problems. An improper spark plug gap could lead to engine knocking and poor performance. When your engine starts and stalls, it is often due to standard maintenance problems. Engine Stalling, Surging or Running Rough When your engine starts and stalls, it is often due to standard maintenance problems.

Is you oil fresh? This means your engine burning oil. Your oil typically tsratton to be changed each season or after every 25 hours of use Refer to our Checking and Changing Mower Oil FAQ for further assistance. Is the spark plug fouled? Is the fuel tank vent or fuel tank screen plugged? You can perform a compression system with a leak down tester.


Test the lead with a spark tester, then test the engine see Servicing Spark Plugs. If you store equipment with untreated gas in the tank, it can lead to engine damage.

Clean spark plugs where applicable Follow instructions for checking and changing spark plugs. Small Engine Problem Solving Tips. Is the valve spring weak?

Small Engine Problem Solving Tips

Is the flywheel loose? Is your fuel fresh? Is the valve clearance set incorrectly?

If the engine is emitting white or blue smoke, this means your engine is burning oil. Check your oil level and appearance every time you use your engine while it is cold.

Troubleshooting small engine problems | Briggs & Stratton

Does the combustion chamber contain excess carbon? Stale, untreated gas begins to break down after about a month. Is there a leaky gasket?

Find the proper carburetor settings and step-by-step directions for Carburetor Adjustment. Air-fuel compression is crucial to engines powering lawn mowers and outdoor power equipment.