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Hi I have a Briggs and Stratton lawnmower that I have given new oil spark plug and is full of petrol and it starts once an then it coughs an dies and won't start again and I don't no what to do

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  • Garden Master
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The main jet is clogged and petrol is not reaching the carburetor properly other than thru the choke circuit which is why it starts and then abruptly stops.

Remove the gas reservoir by removing the nut on the bottom of same. With a very thin wire clear the orifice that is in that nut and also spray some carb cleaner on the inside of the tube that descends into the gas reservoir. Reassemble, install fresh gas and start motor.

Posted on Apr 03, 2015

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  • Master
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Clean the carburetor and make sure the air filter is not wet or plugged

Posted on Apr 03, 2015

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Posted on Jan 02, 2017

bobjrdns
  • 84 Answers

SOURCE: will not start, briggs & stratton 3.75

put a small amount of gas in carb from top and try it. if still not starting make shure choke is in closed position . check the safty switch handle . you do have spark/ and gas

Posted on Oct 19, 2008

  • 37 Answers

SOURCE: mountfield sp470

Hi, first you'll have to change the air filter and the spark plug. now, go buy some hi octane gas. drain the old gas and put the fresh gas in. if this don't solve your problem please write again.

Posted on Nov 23, 2008

hunter19_46m
  • 7482 Answers

SOURCE: craftsman briggs and stratton 6.50 190cc lawn

Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming it 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 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, 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 do not forget to rate me, Thanks
Good Luck, I hope this helped

Posted on May 26, 2010

hunter19_46m
  • 7482 Answers

SOURCE: mountfield petrol mower HP470 problem with

Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming the carburetor a few times or spraying starting fluid into the carburetor, 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 do not forget to rate me,
Thanks
Good Luck,
I hope this helped

Posted on Aug 11, 2010

rycgl
  • 1545 Answers

SOURCE: HI there, I got

There could well be a build up of sediment and debris in the main jet to the carburetor. It is easy to get to and clean. It is the brass bolt that holds the lower float bowl onto the main body of the carburetor. To clean it, drain your gas. Remove the bolt and external washer UNDER the carburetor bowl. Clean out the bowl of any sediment and/or water. To clean the brass bolt, use no metal objects. Carb/Choke aerosol spray cleaner will do the job. Pay close attention to the hole in the bottom of the bolt and the very small holes about 2/3 of the way up the bolt. Clean till shiny with holes cleared and reinstall. Your fuel flow problem and shut off condition may be solved.

Posted on Jun 05, 2011

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