Fixed: How To Repair Mower Starts Then Dies & Fix it Yourself 2021

Lawn mower starts then dies is a common problem with lawn mowers lately. This problem should not be taken lightly, but if you know what to do and how, you can take care of it yourself. Sometimes when lawn mower starts then dies, unfortunately this can even be an indication that your lawnmower is no longer usable. If your lawn mower starts then dies, runs out of gas, and dies shortly after that, these are the four main reasons that this is happening:

Reasons of Lawn Mower Starts Then Dies Step 1:

Old gas is bad but usually not enough to cause this kind of problem. The first step in lawn mower repair if the gas tank is dirty or the carburetor needs cleaning. Check the gas cap and clean it by scraping the inside of it with a razor blade. The interior of a gas tank is filled with graphite, which contains no gas, so it will not dissolve into your oil if you put cleaning chemicals in the tank.

Reasons of Lawn Mower Starts Then Dies Step 2:

Another reason your lawn mower starts then dies is dirty carburetors. Older carburetors usually need cleaning and possibly some new parts. Newer models of lawn tractors have plastic carburetors, and these tend to rust easier than the metal and plastic carburetors from years ago. You can replace the whole carburetors in many cases because it’s relatively easy to do and it won’t take too long to do.

Reasons of Lawn Mower Starts Then Dies Step 3:

A third possible cause of lawn mower starts then dies is a clogged oil tank. This can easily be fixed by adding a little engine oil and doing some simple upkeep on the filters. Sometimes this is caused by a plugged vacuum cleaner hose or a stuck screw in the oil tank. You can check to see if the oil tank needs to be cleaned by putting the dipstick in and checking for white smoke. If the dipstick shows no white smoke, you can safely assume that the tank is clean, but if the dipstick comes out with white smoke, it’s time to clean the tank.

Reasons of Lawn Mower Starts Then Dies Step 4:

The last cause of lawn mower starts then dies is the lack of carburetors. Older carburetors are made of steel and aluminum, and they work just as well as newer metal types such as zinc. The key is to get the carburetors replaced if they’re worn out or show white smoke. Carburetors help lawn mowers work by mixing gas with oil to increase lubrication and increase the mowing speed. Without the proper carburetors, the lawn mower won’t run very well. Sometimes there is no way to immediately tell if your lawn care machine is suffering from a carburetor problem or merely experiencing a little trouble starting. There are a few things to look for, though, when diagnosing a carburetor problem. One thing to look for is a strong odor of fuel. Another thing to look for is a stench like diesel. If either of these smells, call the lawn mower service because it could indicate more serious problems, and it may require a repair. Some lawn care troubleshooting manuals can help you diagnose and repair your lawn mower quickly and easily.

How to Repair Lawn Mower Starts Then Dies

If your lawn mower starts then dies shortly after applying fuel, the defective spark plugs have likely caused the problem. Usually, replacing the spark plugs solves the problem, and you’re good to go. However, sometimes the problem with the defective spark plugs goes beyond that, and the mower won’t start at all. In this case, it’s best to take the car into the dealership where you purchased the vehicle and let them check the exhaust and inspect the pipes for leaks. They’ll most likely discover that the problem is with the dirty carburetors and that the resulting steam from the dirty carburetors is causing the car to shut off.

If your lawn mower starts then dies shortly after adding new fuel, your electric control system will likely not be properly working. This happens because the old gas valve that was turned on to supply power to the motor was not working. This valve is usually brown or black with age, which is the signal that it’s time to replace the old gas valve with a new one. When you take the car to the dealership, they’ll install the new valve for you and then give you a prescription for an appropriate carburetor cleaner. Follow these directions, and your old gas valve should work like new again.


The reason for this may be a blockage in some hoses, bad gasoline or carburetor problem.

Replace the gasoline with good gasoline, also replace the carburetor. These may be the reasons.

If your lawn mower has been starts and dies, you should don't force it to run.

No comment