Mysterious gas leak

Blarg King

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This has been the bane of my existence for the past few weeks.

I have a Yard Machines lawn mower with a Briggs&Stratton 300 series engine on it, and whenever the engine is running gasoline leaks from the carburetor area. I've removed the gas tank and carburetor and thoroughly cleaned them both and applied brand new gaskets and seals between the carburetor and gas tank, replaced the "L" shaped grommet that connects the carburetor to the little metal pipe protruding from the engine (not sure what that thing is called :p ) and replaced the seals that go from the carburetor to the combustion chamber, and still gas leaks out. All the screws and bolts that hold everything together are fully tightened.

I got some UV gasoline dye and a UV flashlight and ran the engine with some of the dye mixed in the gas, but it seems like the gas is coming from everywhere somehow. Whats most confusing is that the gas is on top of parts that are nowhere near any seals. For instance there is gas on top of the screws that hold the carburetor onto the gas tank. How its getting there is a complete mystery to me.

This mower is only 3 years old, so any help in fixing this problem so I don't have to go buy an electric mower would be greatly appreciated.

[EDIT]: I also thoroughly checked the carburetor for cracks when I had it disassembled.
 

ILENGINE

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Most likely leaking between the carb, and the fuel tank, at the diaphragm. The carb, as well as the top of the tank are know for warpage.
 

Blarg King

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Hmmm...
I replaced the diaphragm too....
I'll check the carburetor to see if its warped at all.
 

Blarg King

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So I took the carburetor off, and when I looked closely I could see that the whole bottom is now curved.
Good tip.

Now does anyone know a website to order parts in Canada?
 
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