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I have a leaking (overflowing) carburetor and wonder if anyone has an idea as to what is going on.  I have a 2009 VS, 1915cc, with the standard set up from VS with less than 3000 miles on it.  I started the car this afternoon for the first time in a few weeks.  As usually happens after a few weeks of not running the car, it took a couple tries to get it started, when it did, it ran rough and slow, so I tried to keep the rpm’s up at 1500 or so.  After several seconds it ran (but barely) without me giving any gas but coughed and sputtered.  After a couple minutes of running like that it simply stopped.  I smelled gas at that time.  I turned off the ignition, got out and noticed two pools of gas on the garage floor which came from the tail pipes.  I opened the engine compartment to find a wet (fuel) left carburetor.  With help from a friend who knows a lot about these types of engine/cars, we then took of the air filter and found the mouth of the carb to be full of gas.  We also saw little bubbles every ½ minute or so and figured gas was going down and more coming into the carb.

 

We then disconnected the fuel line to the carb, thinking that would stop the flow of fuel.  At that time, the fuel in the carb drained down (into the cylinder(s), we guessed, and then into the oil).  Fuel continued to come out of the fuel line, so we plugged it and hope it is still holding.  I'll check again later.

 

Does anyone have an idea of what happened?  Any help would be greatly appreciated.

1957 Vintage Speedsters(Speedster)

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Just a little crud in the needle and seat.  If you can take the carb apart, do so and then carefully remove the float and look at the needle.  you should see something on the tip, if not check in the seat there is something in there not allowing the seat to stop the fuel flow when the float chamber is full and the carb is overflowing. 

If your carb has a brass float, shake it and feel for any sign of a "slosh"....  This would indicate a failed joint which allows fuel into the float, causing the float to gain weight and therefore not respond properly....   This is not likely as most of todays floats are plastic, but every once in a while these will fail also....    Just a thought....

Damned scarey!  I had exactly the same problem back when I had my 1915 in my Speedster---actually it was on part of the "Tail OIf The Dragon" event way up in the Smokies.

 

We stopped at a scenic spot and when I walked behind the car I smelled gas.  I opened the trunk and saw gas leaking from the left carb. I was lucky my son Russ was there.  He diagnosed it as having some crud in the carb and had me remove the top of the carb to reveal the intake and had me race the engine to 4,000 RPMs then he slammed his open hand down on the top of the carb and voila the crud was sucked through and the leak stopped on the spot.  He said that was an old VW mechanics trick and was easier than taking the carb apart.  I always did like having Russ along for Speedster trips!

 

This is a good fix to remember!

You can use American steel brake/fuel line. It is available in 1/4", 5/16", and 3/8" I.D. at your FLAPS(friendly local auto parts store) in lots of lengths, even pre-flared with male pipe-thread fittings on either end. Cheap and durable too, aluminum can crack and rubs through much quicker. I'd use steel, no need to go stainless. Whatever you do support it at either end in rubber or silicone, and in the middle too, just like your metal brake line. 

Thank you!!!!!
 
Originally Posted by DannyP:

You can use American steel brake/fuel line. It is available in 1/4", 5/16", and 3/8" I.D. at your FLAPS(friendly local auto parts store) in lots of lengths, even pre-flared with male pipe-thread fittings on either end. Cheap and durable too, aluminum can crack and rubs through much quicker. I'd use steel, no need to go stainless. Whatever you do support it at either end in rubber or silicone, and in the middle too, just like your metal brake line. 

 

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