Lawn Mower begins then stops before in use

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Mine did this.

It means that either not enough gas is getting into the engine. The gas you
pump in when you prime is enough to start the engine but not to keep it going.





There could be several things that cause this.

1. Old fuel:

Solution: Replace the fuel. Dump out the old stuff. If it is a year old it
won;t work.



2. A dirty carburetor:

Solution: Clean the carburetor.

Easy carb clean:

Pull the bowl off and use carb cleaning solution to clean it. (you can buy carb
cleaning solution a Wal-Mart in the automotive section. I have also heard acetone
will work but I have not tried it.) Make sure not to loose the little parts
like the pin.



Better carb clean:

pull the carb off the machine and clean each part with carb cleaner. There is a
youtube video someone else posted on how to do this.



3. Your gas/air flow is not adjusted properly.

To check:

Pull off or out the air filter. Try to start it.

Solution:

If the machine runs longer there are two options: The air filter is dirty so
replace it, or the air flow is not adjusted proberly. There should be a screw
like thing sometimes called the "main jet" that you turn to adjust
the air flow. It is on the carburetor side or bottom.

If the machine dies faster or won't start there is probably too much air flow
and by removing the filter you added more air. Adjust the "Main Jet"
as above.








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It means that either not enough gas is getting into the engine. The gas you pump in when you prime is enough to start the engine but not to keep it going.


There could be several things that cause this.
1. Old fuel:
Solution: Replace the fuel. Dump out the old stuff. If it is a year old it won;t work.

2. A dirty carburetor:
Solution: Clean the carburetor.
Easy carb clean:
Pull the bowl off and use carb cleaning solution to clean it. (you can buy carb cleaning solution a Wal-Mart in the automotive section. I have also heard acetone will work but I have not tried it.) Make sure not to loose the little parts like the pin.

Better carb clean:
pull the carb off the machine and clean each part with carb cleaner. There is a youtube video someone else posted on how to do this.

3. Your gas/air flow is not adjusted properly.
To check:
Pull off or out the air filter. Try to start it.
Solution:
If the machine runs longer there are two options: The air filter is dirty so replace it, or the air flow is not adjusted proberly. There should be a screw like thing sometimes called the "main jet" that you turn to adjust the air flow. It is on the carburetor side or bottom.
If the machine dies faster or won't start there is probably too much air flow and by removing the filter you added more air. Adjust the "Main Jet" as above.