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Lawn Mower leaks petrol


I have a slightly old lawnmower that is leaking petrol (prob about 10yrs old). I have started it a few times recently, so it definitely works, however it leaks petrol out of a 2mm hole in the carburetor. What is this hole? It is a machined hole, not a crack or anything. I'm guessing it has something to do with air intake, but petrol leaks out of it. And now the mower won't start? Could the engine be flooded? All help is gratefully received!

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It might be for a missing hose to a primer bulb or return line to the tank. does it seem like either are missing?

Posted on Nov 29, 2008

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How can i order a bump headknob for a ICON Petrol Grass Trimmer ICPLT26

Hi Lorraine, Any lawn mower store can order the part for your trimmer in if they don't have it there at the time....

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It wont start, just stop starting, Plug ok, Fulled new clean petrol.Its leaks petrol from the exhaust.

sounds like the little engine is flooded. or you might have forgot to mix 2 cycle oil or used the wrong mixing ratio and the piston rings are fried. it happened to me once or twice.

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Replace fuel lines

take old fuel line to mower store need length as well as inside diameter of old hose measurements. if its in pieces take all of them with you. sometimes they have fuel line at a hardware store, but better off finding a lawnmower store for sure.

Nov 04, 2014 | Garden

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Mower starts but wont keep has petrol and oil,it had carberetta serviced last year.

You might have the same problem as had last year, did you burn all the old gas out last year before storing for season? If not you will have to drain old out and probably remove and clean your carbureator it probably gummed or varnished up from old gas, hope this helps you

Apr 25, 2011 | Garden

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I am having trouble starting my lawn trimmer. Its relatively new and I have changed the petrol to make sure its 'fresh'

purchase some carb clean and take your air box(filter) off and hold throttle wide open spray short burst in then try to start, if fires up and quits,try until it goes, prob have to work old gas through it, also make sure your primer is functional full of gas and works o.k.

Apr 07, 2011 | Garden

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What is wrong when your not getting a spark on your lawn mower? It won't start with new spark plug, getting fuel

Dear Kurain,
Howdy, "Coach Dave" here and I work for The Home Depot. I deal with quite a few lawn equipment problems so let's see what we can do for you.
The first thing that comes to mind is perhaps your new spark plug may be defective, it's rare, but happens.
The next thing to check would be the spark plug wire. A spark plug wire wears out sooner or later.
The next usual reason for a small engine not starting is dirty fuel. This reason is more common than you would think and checking the fuel line and adding fresh gas can fix this easy.
Without getting in depth of other problems like ignition coils and such, you might have to take it to a lawnmower shop to get fixed. Although this might sound like an expensive proposition, it is far less then buying a new lawnmower, and who needs a lawnmower that does not work?
yours respectfully, Coach Dave

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1 Answer

Well i have a KAWASAKI KBH48A petrol strimmer and it will start but wont rev up enough to cut grass and help?

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

May 18, 2010 | Garden

1 Answer

Can you advise recommended oil for these mowers. I was told 20/30 grade. Is this correct? Thank you laurie

Well, you didn't put the make or model number of your lawnmower here so there is no way we can know with absolute certainty what your mower needs. However, every single walk-behind mower I have worked on in the past 20 plus years uses SAE 30 lawnmower oil, which is available at any home improvement store or lawn and garden center.

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2 Answers

Petrol lawnmower cutting out.

try changing the spark plug. if that doesnt work check the fuek lines for hole and leaks, check the fuel filter and clean if necessary. remove the carbuerator and inspect the gasket; it should be soft and flexible, if it seems hard or brittle replace it. clean the carb with carb cleaner sray (available at any local auto parts store) and compressed air. make sure you get inside the small fuel rail holes. also check the primer bulb for pin holes and proper seating/seal.

Aug 29, 2008 | Garden

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