Carb problem

What horrible luck... A 50 degree day in December in Minnesota at that. and my carburetor decides to start leaking gas everywhere. I Unhook the tank and run the engine and no gas leaks . The carb which looks something like this... http://www.maksbikes.com/index.php/85-y ... -bike.html only drips from one of the sections it seems.. Any suggestions. or Ideas at what the problem is.

 

We need to narrow some things down.

Which bike?
Which carb?
Where on the carb is the leak?

 

You'll have some Testing to do:

The Carbs leak because the Gas in the Tank is not being properly controlled.

The Petc0ck may have been in the wrong position. Not being regulated by the Vacuum Valve.
The Petc0ck may have developed a leak. Failing to close despite the Vacuum Valve not opened by Manifold Vacuum.
TEST Petc0ck.

Carb Floats not functioning properly.
Stuck Floats.
Worn-out Float Pins.
(Float Heights. Less likely if the problem just popped-up.)

You can rebuild the Petc0ck.
Its a crap-shoot.
There's a magnificent pictorial to guide you through the process.

I replace the Petc0cks rather than rebuild them.
If the new one leaks; it gets brought back for one that don't.

If you are going-after a leaking Carb.
The Fuel Bowls leak when the gaskets are toast.
If you need to pull the Carbs; have them Cleaned by someone who will guarantee they will be thoroughly and completely done right.

 

First things first.

Take your shoe off and hit the carbs with the heel of it. Often times either float meachanism/needle can get sticky or an invisible bit of grit gets stuck between the float needle and jet - either way it does not seal and petrol pours out of one overflow. A sharp knock can sometimes free it and stop the problem. Not always, but this costs nothing to try.

If it repeats very often, you may want to look more closely.

You could also drain out the petrol from the affected carb to try and rinse out the problem. A slightly more difficult approach is to pull off the vacuum pipe and plug it (with a screw) and then run the engine, controlling fuel flow turning it to prime and back, which uses the vibration of the engine as well as petrol flow to clear any problem.

Usually a sharp tap on the edge of the carbs is enough though, especially if petrol is flowing at the time.

Do it outside, though, and make sure you're not smoking...

 

Hi friends, from a newbie ...
I had the same problem today, fuel everywhere when the engine was running. I checked that the fuel comes out from a small rubber pipe which is connected to the bottom of the air box. It seems to be an exhaust pipe...
I know for sure that the fuel cock doesn't work, that's why it's always in RES position. I own this bike since 2001 and this is the first truble I've ever had.

Any suggestion?
Thanks

 

Stuck float contender18 by the sounds of it.

 

That means I have to dismount the carbs' bottom covers? Or may be just try to hit them ...

 

When gas is Flooding enough to overflow or wind-up in the Airbox; smacking the Fuel Bowl can't get to the heart of the matter.

Gas is getting from the Tank, ... through the Petc0ck ... and the Floats aren't working right.

Test the Petc0ck.
If the Vacuum-operated Valve is leaking you have to deal with that leak.
a) Rebuild the Petc0ck
b) Buy a New Petc0ck

The New one should last as long as the Original.
My personal opinion regarding rebuilding is:
Rebuilding is a labor-intensive process using aftermarket parts which may or may not result in alleviating the leak.

Carbs:

Leaking Float Valves and Seats need to be replaced.
They're not Parts that do not wear-out.

(Ordering Kits which feature Viton-tipped Pins is worth the extra dough.)

 

Thank you so much Rick, you're a professional!

I guess this trouble depends on the dirty fuel...
I'll follow your suggestions.

 

Don't depend on the Petc0ck Screen and the Beenie-screens to keep-out harmful matter.

Install an Inline Fuel Filter, too.