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.
Why does my lawn mower start but not stay on?
A full gas tank and oil reservoir are the essential first steps when checking why the lawn mower won’t stay running, but the problem could also be a dirty filter, clogged carburetor, improper fuel mixture, or a dirty spark plug.
Why does my lawnmower keeps dying?
The spark plugs are worn or damaged
If you find that your lawnmower keeps dying, or keeps stalling while cutting grass, then inspect the spark plugs. Look for signs of damage or wear. Something as simple as a cracked porcelain insulator can mean an electrode has been damaged or burned away.
How do you clean a carburetor on a lawn mower without removing it?
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?
In the case of a riding lawnmower, it could take a lot longer for the starter motor to turn the engine over, which could also start to tax it or even affect the life of the battery. A badly degraded or deformed spark plug could cause the lawnmower’s engine to stall.
Do you have to pour gas in CARB to start lawn mower?
Some engines on push mowers have a priming bulb that forces fuel into the carburetor. Other models do not have this feature and must be primed manually if the engine ever runs completely out of gas. You can prime your push mower by pouring gas directly into the carburetor.