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Lawn Mower Carburetor Not Getting Gas

August 14, 2017

I was mowing and it just died. It was like it ran out of gas. I looked and I had a third of a tank. From that point on it would only run if I sprayed gas in the carb. When I do it right it runs at an idle speed only. It is not getting gas to the jets in the throat of the carb.

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I replaced the carb with one I know works, but the same thing happens. So far at least 3 experts including Briggs & Stratton techs are baffled. It is a YT3000 Sears with a 21 horsepower engine and 46 inch cut. Thanks.

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Diamond Post Medal for All Time! 1,246 Posts
August 14, 20170 found this helpful

Perhaps you need a new fuel pump.

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Gold Post Medal for All Time! 677 Posts
August 14, 20170 found this helpful

Check all the fuel lines to the carburetor. If those are good, then check the fuel pump.

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August 14, 20170 found this helpful

All that has been done all my info says ethanol gas causes problems and no fuel is coming out of the jet other then that its all flowing great also even when I spray gas I can't get past a fast idle.

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Bronze Post Medal for All Time! 105 Posts
August 14, 20170 found this helpful

I would suggest starting off by downloading the YT 3000 operation manual. Here they have a help section and a carburetor design. It seems you are having an issue with the ethanol gas. I would start by taking my carburetor apart and giving it a good cleaning. You could have a stuck valve inside the carburetor that isn't allowing the gas to flow freely. You might need to replace your fuel jets on the carburetor. Here is the manual you can download online:

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www.manualslib.com/.../Craftsman-Yt-3000-1793153.html

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August 15, 20170 found this helpful

Jets are all clear. I have replaced the carberator coil gas and spark plug. It will start and run smooth at idle speed as long as I spray gas in the throat of the carb.

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Gold Feedback Medal for All Time! 949 Feedbacks
August 16, 20170 found this helpful

It seems you have tried everything the experts instructed you to do but nothing worked - have you talked with the Sears Service Center about this problem? I know they have always been helpful with my problems and usually have suggestions to try (given over the telephone) but its for sure they should know more about your mower even if others have failed.

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At this point I would suggest giving them a call.

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Bronze Feedback Medal for All Time! 116 Feedbacks
August 18, 20170 found this helpful

Did you also replace the fuel lines and the filter? If not, replace those fiirst before thinking about the fuel pump.

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June 11, 20190 found this helpful

Some gas lines after exposure to ethanol will pinch under even the slightest vacuum. Replace the fuel line.

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August 8, 20190 found this helpful

Check your wires , that plug in to bottom of carb. That allows gas to go in it might need pushed up to plug in properly . Try that and hopefully that fix your problem .

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4 More Questions

Ask a QuestionHere are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community or ask a new question.

July 16, 2009

I have a Sears 16 hp twin riding mower. When I went to start it the engine didn't suck gas through the gas line. After cleaning the carburetor the engine sucks gas part way to the carburetor. What do I do? How do I check the fuel pump and where do get a new one?

By Matthew from Napa, CA

Answers


Bronze Feedback Medal for All Time! 107 Feedbacks
July 16, 20090 found this helpful

Could the fuel line need blowing out?

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Bronze Feedback Medal for All Time! 107 Feedbacks
July 16, 20090 found this helpful

Could the fuel line need blowing out? Or do you need a new spark plug?

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August 8, 20190 found this helpful

The fuel pump works off a vaccum so make sure your vaccum hose is good n has no bad places .

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August 7, 20200 found this helpful

I have used my Craftsman 42" lawn tractor for over 25 years... the vast majority of those years I used regular 89% gas ....no problems... I used the same gas in my Honda ATV... but I do not use the ATV often, and it became hard to start... I removed the carburetor, and the metal had turned green. I ordered a new carburetor. installed a new play, and breather, and the problem was solved... I decided it was time for me to switch to no ethanol gasoline. It was only a few weeks before I had a problem with my mower. It cut off during cutting with no warning. I removed the gas reservoir cap, and saw a couple black things floating in the gas. Then I inspected the gas filter, and saw tiny specs of black inside the filter. I pulled the tank off, cleaned it . I also removed the rubber gas lines and found one was eroding at the connection to the gas filter.

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The gas lines are only a couple years old, so I assumed that changing from regular gas to high octane gas must have caused the rubber to break down. I cut off the ends on the rubber gas lines, blew out the lines, checked for any obstructions, and reinstalled them onto the filter. I cut grass almost every day when the weather permits. It is my relaxation... I do have a problem that I had once before, and I can't remember what it was. I can be riding along with no problems and my mower will shut off, with out any sputter . I look at the gas filter and it is empty. I get off , wait a few minutes... the filter is again full, and my mower cranks perfect, and runs for about 30 minutes and the exact thing occurs . Like I stated this happened a long time ago, but I can't remember what the fix was... please someone remind me...

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Archives

ThriftyFun is one of the longest running frugal living communities on the Internet. These are archives of older discussions.

July 16, 2009

I can't get my lawnmower started. I have changed the fuel, changed the spark plug, changed the air filter, changed the air filter gasket, and changed the oil. When I dump lots of fuel in the carb it will run for about 2 seconds, then it dies. Any suggestions?

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June 17, 2008

I have a 4 hp Briggs and Stratton push mower (Murry). the carburetor is not getting any gas, even when the tank is full. Do I need to get another or is there some other things I can try first?

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October 4, 2007

I have a Briggs and Stratton engine on my push mower. The primer will not move any gasoline to the carburetor. Once I took the carburetor apart and it worked for a short while.

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