Question: Why does my lawn mower start and then stop right away?

Why does my lawn mower only run for a few seconds then dies?

You Need to Replace Old Fuel

If the gas in your lawn mower has been there for a while, evaporation can change the consistency of the liquid. The gasoline won’t move smoothly through the machine, creating a restricted gas flow and leading to an engine that runs for a few seconds and then dies.

Why does my lawnmower start and then shut off right away?

If your lawn mower starts, runs briefly, then dies these are the four most common reasons that’s happening: Dirty carburetor / clogged carburetor bowl. Old gasoline that has gone bad. Dirty or defective spark plugs.

How do you clean a carburetor on a lawn mower without taking it off?

Use Carburetor Cleaner

Fortunately, you can generally do this without even taking the carburetor out of the engine. Start by purchasing some commercial lawnmower carburetor cleaner, which comes in a simple spray can and will make it easy to clean the inside and outside of the carb.

Can a bad spark plug cause a mower to stall?

A bad spark plug often causes an engine cylinder to misfire or sound like it’s struggling. The engine might even stall out completely while you are mowing. You may also notice that it becomes increasingly more difficult to restart the mower each time that it dies.

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Why does my lawnmower keep stopping?

The most common cause of a mower failing to keep running is a clogged air filter. Take the cover off the air filter compartment and remove the filter to see if it is dirty, or clogged with oil and dust. … If it is a dirty paper filter, buy a new one; these cannot be cleaned.

Why is my lawn mower starving for fuel?

A lawn mower that fails to deliver fuel to the carburetor will typically not even start. Other problems, such as a lack of or a weak spark at the spark plug, can also render a mower useless. … If the plug is dry and no gasoline odors emit from the engine, the mower is starved for fuel.

Why does my lawn mower cut off when it gets hot?

Air leaks cause an engine to pull in too much outside air, which throws off the gasoline-to-air ratio. As the engine heats, parts expand, and all tiny gaps become larger. The result is a poorly running engine and one that eventually stops. Loose bolts are a common culprit in a mower engine that shuts down when hot.