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Lawnmower carburetor Loses power anr will not sta running

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A carb cannot loose power
an engine can
sounds like you gas is bad or your carb is dirty or both
what are you working on ?
what engine does it have ?

Posted on Apr 28, 2015


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Engine will start after priming but stops quickly (actually runs only very slowly and then stops).

Rheupel, Check that you have good fuel flow in gas line from tank. It sounds like a carburetor issue still, one of the ports are still plugged or float level is not set properly. Did you remove and clean emulsion tube in carb. If your carburetor is of diaphragm type, replace the diaphragm. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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Lawnmower keeps turning off after i run it

low oil level will shut down a lot of mowers as the mower overheats the valves do not seat and it loses power and stalls out

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Pump loses power

if impeller is not clogged check on recirculate if ok change sand

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Briggs & Stratton 4 cycle Lawnmower engine no fuel from carberator. Fuel is being supplied to carberator but only runs when starting fluid is used. Gas is new. What's clogged?

the float may be gummed up. or the needle is plugged up.
you need to clean the carburetor, old gas left in the carburetor turns
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3.5hp gas lawnmower motor runs but, major decrease in power running on and off; what might this be?

carburetor may be clogged, or the needle and seat may need replaced. Hope this helps Tim

May 01, 2011 | Garden

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Starts-runs-loses power. Set period time-Starts-runs-loses - power. Possible do away with computer and/or air control. Change carburetor ? JDW

91 model should have fuel injection, not carb. Start with the simple stuff. Fuel filter, Oxygen sensor or fuel pump.
If it is carburator it sounds like sticking choke,

Nov 23, 2010 | 1991 Ford F250

1 Answer

When I try to start my Craftsman Model # 917.388861 lawnmower, it will start and then dies right away, then Iit would start unless I prime it. Before it started doing this, the lawnmower was running very...

Sounds like you will need to clean your carburetor.
Be sure to use compressed air to blow out all the fuel and air passages.
Sometimes you can get by with priming the carburetor a few times, and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
If the mower/weedeater is over a couple years old, then I also recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
When you clean your carburetor and remove the jet screws, You will first seat the jet screws and count the number of turns it takes to seat the jets from their original position.
That way when you go to put the jets back in, you know how many turns they were in/out.
Please rate me,
Good Luck,
I hope this helped

Aug 16, 2010 | Craftsman 675 Series 190cc 22" Briggs ...

1 Answer

Carburetor manufacture for Honda Lawnmowers.

Honda manufactures all their own products in their own factories including the carburetor

Oct 25, 2009 | Garden

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My huskee model # 28 N707 lawnmower will not keep running.

It sounds like 2 different problems. One is that your battery is shot. It needs to be replaced, and to keep that from happening prematurely, put a smart trickle charger on it over the winter because lead/acid batteries lose 1% of their charge per day, making them virtually discharged in 3 months. This causes damage that they cannot recover from.

The second problem sounds like either that you are not tending to the choke properly or it needs the carburetor thoroughly cleaned because of clogged jets. Before winter storage, be sure that any fuel in the system has been treated with STA-BIL to prevent it from breaking down and forming deposits.

If you have the technical know-how, get a carb rebuild kit (usually about $20) and remove, clean, and reassemble the carb using the new gaskets and parts. If not, bring it in for repair.

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