13.5hp Briggs And Stratton Intek Lawn Mower Engine

I can start up my mower and it will run for a few moments and then it will cut off. if i pull out on the choke it will run a little longer until i have to push the choke back in and pull it back out to get it back to my shop.
i put in new gas and changed the oil and filter, also replaced the air filters in it.\
what do you think is the problem
Experienced gardeners share their insights in answering this question :
The fuel filter needs replaced or the carburetor needs cleaned.

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Disconnected, dirty or fouled spark plugs are common causes for engines that won`t start. For small engines, spark plugs typically need to be replaced every season or after 25 hours of use. You should also check to make sure the spark plug gap is set correctly.
The reasons why mower is not moving forward or reverse is that the battery is dead, or due to clogged fuel line. Additionally, malfunctioning transmission, or a broken drive belt, also a faulty spark plug, even when friction wheel isn`t in contact with the friction plate, or damaged Tires.
A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall.
Try replacing the fuel filter; a clogged one will make the mower run sluggishly. Alternatively, check the spark plug. A spark plug that`s outlived its usefulness can cause a sluggish start. Pull the spark plug out, clean it off and reinstall it in the mower.
Your lawn mower turning over but not starting due to several reasons, such as a faulty or disconnected plug, a disconnected spark plug wire, a clogged air filter, or a contaminated fuel tank. A faulty carburetor, a dirty cutting deck, or a dysfunctional flywheel brake can also cause this.
The most common reason for a no start, not even a click sound, is a totally flat battery, but other likely causes include: Transmission in Drive. Brake Pedal not Pressed. Blade Switch / Lever On.
Condensation inside the gas tank is one culprit, but moisture can also enter the system through a loose or ill fitting gas cap. The best solution is to drain the mower`s gas tank and refill it with fresh gasoline. A clogged fuel filter can also cause a mower engine to die.
As the fuel level drops, a vacuum begins to form in the fuel tank because air can get in to fill the space the consumed fuel occupied. After about 10 or 15 minutes, the vacuum will become strong enough that fuel will stop flowing to the carburetor and the lawnmower will die.
Touch the metal shaft of a screwdriver to both of the large terminals at the same time. If the engine turns over and starts, the solenoid is bad and should be replaced. If the starter motor does not run, the motor itself is probably defective.
A dirty carburetor is one of the most common causes for a lawn mower not being able to start after sitting unused for months or years at a time.
When the starter motor solenoid engages, you should hear a clicking sound. If you hear a clicking sound but the starter motor isn`t moving, the solenoid could be engaging but not receiving enough battery power. If there`s no sound, the starter solenoid is likely malfunctioning or you might have a dead car battery.
If the engine will not crank, you likely have a problem with… Discharged / defective battery or faulty electrical connections. To address these issues, check the battery and charging system for problems. Faulty parts: potentially the safety interlocks, starter motor switch (open circuit) or solenoid.
The most likely cause of a no-start mower after running out of gas is dirt in the carburetor, but other possible causes include: Air locked gas system. Faulty carburetor. Contaminated gas.
Some of the B&S auto choke carburetors tend to supply too much fuel to the cylinder when hot starting; this floods the spark plug, causing a no start. They have since modified the carburetor. So if you have an auto choke, Briggs, with the hot start problem, go ahead and swap out the carburetor.
The most likely cause of a no-start mower after running out of gas is dirt in the carburetor, but other possible causes include: Air locked gas system. Faulty carburetor. Contaminated gas.

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ANSWER : Do a model search on www.partsdirect.com. This is the website for Sears equipment. Just reminder you will need the model number from under the seat to help you find the right model.

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ANSWER : Grease your shaft and make sure you have no dirt on it, even dust can hinder getting it on right.

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ANSWER : Check your solenoid make sure that is plug in right

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