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My 1 yr. old mower will not remain running, cuts off after a few seconds and is hard to start

I have cleaned the air filter - not the problem; I have a can of carb cleaner but cannot locate the manual so I do not know where it is to do this. Thank you.

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  • Master
  • 957 Answers

The air filter is connected to the carb. when you take it off you should see the carb.

Posted on May 11, 2014

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Posted on Jan 02, 2017

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SOURCE: B&S engine backfires, runs better with choke 1/2 out under load??

Check your rockers inside valve covers. They some time work loose. If they are loose the push rod will fall off rocker and cause the problem.

Posted on May 31, 2009

joecoolvette
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SOURCE: my 13hp honda generator won't run.I have cleaned

You cleaned the fuel bowl? Was there any dirt, etc, in it? How does the fuel line look? How about the bottom of the fuel tank? How old is the fuel?

From your description, it 'sounds' like a fuel system problem. If it's a Honda EU3000is, it has Electronic Ignition, and electronic ignition usually just goes out all the way, not slowly.

The fuel line is small, and easily obstructed. Does fuel flow when the fuel line is removed from the carburetor? After the generator starts, runs, then dies, remove the float bowl. How much gas is present?

Observe the float. See if it's in good repair.
Check the float needle. See if the rubber (Neoprene) tip is squished, or is still in good shape.
Could be that when gas fills the float bowl, the float raises, then gets stuck in the up position, cutting off the gas flow.

Posted on Aug 31, 2009

Testimonial: "thank you very much for your help,most greatful.The Gen Set is at my farm and I will "attack' it this week and let you know how I go.thanks again."

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SOURCE: 3.5 Briggs with not run at full throttle

same problem, was told it was the jets, are your symptoms as follows
runs at low throttle, will only run at full throttle if fully choked
dies if choke is relieved

Posted on Apr 16, 2010

  • 48 Answers

SOURCE: oil in air cleaner

Run it minus an air filter until all the oil is off your piston head, you can also try keeping the plug out and ejecting the oil via that access by pulling the cord. It seems like you've already solved the problem, now you're just cleaning up.

Posted on Apr 22, 2010

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SOURCE: I have a sears lawn tractor with a 25 hp ohv

So have you actually checked spark to both plugs? If so then inspect valves to be sure valves are operating. Sounds like running on one cylinder. A quick check would be to unplug one spark plug at a time. You may find if you remove the dead plugh wire, there is no change. If you unplug the running cylinder it probably won't start. Sometimes the compression release mechanisms can come apart or come loose. Download your manual for you engine model at www.briggsandstratton.com

Posted on Aug 10, 2010

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Hard to start, when it does start only runs for a few seconds.


You need a full tuneup which means after the spark plug you need to do all of these and you will have a good running mower.
Drain gas tank.
Take carburetor off and clean it.
Pull the top off the engine and clean the flywhee maginets and the coil face with a small wire brush of emery cloth.
Clean screen in gas tank if there is one.
Fuel filter if the is one.
Be sure to check for a good spark after all this is done.
If this is all done you should have a good running mower.
donnyb60

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