Question about Craftsman YT 4000 42" Briggs Stratton 24 hp Gas Powered Riding Lawn Tract

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Just got the mower 6 weeks ago gas cap will not stay on if you cut around bushs. I have gotten leaves in tank,need to take tank off to clean it out. It is a YT 4000 42 in. cut 24 hp . thank B.M.Davis Jr.

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Only around bushes? If you getting so close that the bushes are forced up against the bushes I recommend trimming this area, or use a push mower if the ground is in good shape for it, however if your not getting very close to the bushes I will need more info

Posted on May 20, 2011


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Is there a check valve in the fuel system? when I shut off engine, gas runs back to tank, cranks a long time to get it back and start up, will almost drain battery after it sits for a week!

if its running back to tank after engine shuts off it souds like your fuel tank vent is clogged in your fuel cap...try loosening your cap and see if it quits siphoning back towards tank. you may have gotten dust or dirt in the tiny hole or holes in top of gas cap.

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Toro Mower wont stay running

The main reason why a mower starts up and then cuts off after a short period of time is because of poor air flow to the carburetor and is most likely a blockage somewhere.

First you should try this. Remove gas cap and filter then place a really thick rag over the top of the carb where the filter was and either blow into the gas tank or wrap a rag around a tapered air chuck and then place the air chuck in the gas tank (with rag fitting snug around chuck) blast it a few times and listen for bubbling, if it's bubbles then you have removed the blockage..
Take the carb off of the mower and clean the carb / jets with a thin piece of wire.
Be sure to clean the gas tank completely and the fuel line.
Check the oil level, some mowers have a low-level oil shut off.
Change the plug out with one thst is reccomended for your engine.
I wouldn't reccomend running the mower without the filter, that causes dirt and grass debri to enter the carb, fuel line and tank.

This should fix the problem, if it don't you should find a lawn mower repair service.

I hope this helps.

May 11, 2013 | Garden

1 Answer


Sounds like it coul be a weak fuel pump.Check the fuel pressure an make sure its within the specs.If its not then replace the pump.

May 30, 2012 | 2002 Oldsmobile Alero

1 Answer

After a rainny week, bad fuel developed in my fuel tank before I tryied to cut the grass. Now my mower runs high and low speeds and cuts out when cutting 6-8 inch grass. I am sure my curberator needs a...

Yes, you are right about the carburetor cleaning. You also need to replace the diaphragm and gasket when you remove the carb. to clean it. It is located directly over the fuel tank. I'm attaching a video to help you do this:

Good Luck!


Aug 10, 2011 | Poulan Garden

1 Answer

Mower starts and runs but as soon as you move it, it dies. I have taken the carb and tank off and cleaned them, still does it.

There is probably debris that made it through the gas cap and into the tank, and is now clogging the fuel pickup tube. Had this something similar with a Poulan after my first use. Use a suction bulb or vacuum tester to draw contaminated gas out of tank, and rubber band a coffee filter over the cap in the future. You may have to slosh the fuel around, and perform this a couple of times on subsequent uses to get it all out. May want to clean the spark plug with a wire brush to get rid of the carbon deposit that has accumulated. DO NOT put a piece of coffee filter under the cap above the cardboard, it will get splashed with gas and stall the engine. Trust me on this one. After I performed this repair, the mower cut like a champ again, and the fuel consumption dropped in line with the old mower.

Oct 23, 2010 | Poulan "Poulan" Push Mower

1 Answer

Hi, I have a simplicity brodmoor mower, purchased new in 1994. Recently the mower will run for about 15 minutes and die. I let it rest for a half hr & it starts back up again. I eventually get the lawn...

not saying this is your problem, however i have found this to be a problem in some cases. Because of the time duration that the mower runs then quits, i'd almost have to say (believe this or not ) your gas cap vent may be plugged. As gas leaves the gas tank, air has to replace that space. If air can't get into the tank, then as gas leaves the tank, it creates a vaccume, and shortly, no gas flow. try replacing the gas cap or make a small hole thru the cap so air can get into the tank. I'll be wondering how this works out for you.

May 28, 2010 | Garden

1 Answer

475x runs out of gas during normal ops. Leave key

the gas cap quit venting the's causing a vacuum that the pump can't draw fuel check, loosen the cap and cut some grass...if it works, clean out the hole in the top of the cap...if not replace the pump..

Apr 18, 2010 | Garden

1 Answer

Troy bilt mower won't stay running to cut lawn

You may want to check the gas cap to see if it clogged with dirt. If the gas cap is clear, you more than likely have a carburetor problem. If you need tips on carb. cleaning, feel free to ask.


May 29, 2009 | Troy Bilt 5.5hp Self Propelled Mower

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