Author: Briglinhall | Published 10:30 AM, May 11, 2021

Answer: Lawnmowers look like simple machines, but they require some TLC to run smoothly-especially if they have been sitting in a shed for a while. Filling up the fuel tank and fuel tank is an essential first step when checking why the lawn mower cannot keep running, but the problem can also be a dirty filter, a clogged carburetor, an incorrect fuel mixture, or a dirty spark plug. If you are ready to get your hands dirty, check out these troubleshooting tips to get your lawn mower running again. However, you may need a lawnmower expert to allow you to redo the lawn. Or, a landscaping professional can handle it for you.

Fuel that stays in the engine for a while will evaporate and leave a sticky residue. The inlet and outlet to the carburetor and the fuel filter may become clogged. In the cold and humid winter, the condensed water will collect in the fuel tank and will not mix with the fuel. Replace old, dirty or diluted fuel; adding fresh fuel will not solve the problem. Drain the old fuel from the fuel tank and collect it for safe disposal in accordance with local requirements. Before refilling the fuel tank, clean the carburetor port.

The motor has an air filter to collect and capture dust and debris that may block the internal work of the machine. Over time, they can become clogged and need to be replaced. If the air filter is not working properly, the motor will not get enough air to prevent overheating. Check whether the air filter has carbon deposits or oil stains, and replace it if it is contaminated. If the paper filter is contaminated, it always needs to be replaced immediately, but the dusty foam filter can be cleaned and dried at least once before replacement. It is recommended to replace the air filter after every 25 hours of use.

One reason for the inconvenience that the lawn mower cannot continue to run is the problem of the carburetor, which mixes air and fuel for internal combustion. The carburetor bowl may be clogged, or the inlet and outlet may become sticky due to fuel residue. Remove them and spray them with atomized carburetor cleaner (not water). You can try to disconnect the fuel lines and spray them with detergent to remove any remaining sludge. If the carburetor shows signs of contamination, it is also recommended to replace the fuel filter. If the lawn mower has air cap vents, open it to clear any visible blockages. If none of these steps solve the problem, it is worthwhile to have the carburetor replaced by a professional.

Most lawn mowers have a choke to change the fuel and air mixture, keeping the engine running until it warms up. Unless you have a period of cool weather, you should close the choke to prevent overloading the engine due to the wrong fuel mixture. If the choke door is opened for too long, excess fuel will flow into the combustion chamber, causing it to block and stall. If this happens, the lawn mower will need to be idle for several hours to allow fuel to drain from the combustion chamber. Turn off the choke and try again later. If the problem is not resolved, the choke switch may be faulty. Use carburetor spray to clean or completely replace.

A faulty or dirty spark plug may be the reason your lawn mower cannot continue to run. It may produce the initial spark, but if the plug is blocked by dust and oil, the spark will not be enough to keep the engine running. The spark plug is usually located on the front of the push lawn mower and connected to the black cable. Remove it with a socket wrench and clean it with a wire brush and some brake cleaner. The black, sticky carbon residue indicates that the spark plug needs to be replaced. Especially if you have repeatedly encountered a situation where the lawn mower cannot keep running, arranging regular adjustments can help the spark plugs stay in good condition throughout the year.

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