carburretor float bowl flooding

[The Other PaulG]

Intermittently, one of my float chambers floods, pouring fuel at quite a rate over my left boot.

The float seems to float, the pivot seems not to stick, so I am thinking I should replace the little brass valve that stops the inflow.

But if it's only an intermittent fault, most of the time that valve does in fact seal so that suggests it may not be worn out...

Any thoughts?

Paul G

 

[Tarka]

Remove the float and check for cack on the tip of the float needle. (What you call "the little brass valve that stops the inflow" )

Though it may well be worn with a ridge on the tapered tip.

Also check the sprung 'rat tail' at the float end of the float needle isn`t slightly gummed.

Have you got solid or hollow floats ??
A hollow one may be perforated and have fuel in it,weighing it down...but that`s most likely to flood all the time then.

Another thing...you sure it`s flooding and not the float bowl gasket weeping ??

I had terible trouble with my LegoBike float bowl gaskets weeping...both sides at the same time....it was so bad that I got new gaskets.
But it still happened...even after packing under the float bowl clips.

I the end,I suspected dodgy additives in our messed about with petrol and when I filled up at a different garage,the problem disappeared.

 

[Steptoe]

Giving it a kick while riding along used to stop mine leaking.

Until i kicked the float bowl off while riding along the strand one day Fortunately all the cars and buses missed flattening it while it bounced around in the road.

Check the rubber end of the float needle, they go hard with age and don't seal as well.

 

[The Other PaulG]

Ha!

Thanks for the responses, I'll investigate further.


PG

 

[Flipfly]

Bertha did this to me last time took her out. Never been a problem before, but following an extended period of sitting in the garage she let fuel out all over my right foot!!!

Took the float bowl off, flicked the float up and down half a dozen times, problem solved.

Smoked a fag whilst doing it to stop anyone coming over to ask me about the problem, worked nicely, had no enquirers and got on my way swiftly

 

[The Other PaulG]

..... she let fuel out all over my right foot!!!
D

I have a broad range of footwear, all Size 10, with petrol-soaked left feet. Interested in a trade...?

 

[(RIP) Arkwright]

Just occasionally the floats stick in the fully open position when the stainless piece on the top of the float gets itself stuck on the post that houses the pivot pin (DAMHIK) minor modification is then required to the stainless bit (you may find a witness mark on the post)

cheers,

 

[Flipfly]

I have a broad range of footwear, all Size 10, with petrol-soaked left feet. Interested in a trade...?

I think it was a BMW patent back in the days when all this electronic malarky was just a twinkle in the fortune tellers ball.

Heated boots!!

 

[SJRoome]

Hi

The Bing Carbs are very prone to leaking, try the following.

1. Turn off both fuel taps. Remove the float bowl from the offending carb. Check whether there is any rust in the float bowl (fine brown powder). If there is fit new fuel filters. Lift up the float gently with one finger. Turn on the nearest fuel tap and gently lower the float until petrol comes out. Then gently raise the float until petrol stops flowing. At this point the top of the float should be parallel with the carb body.

2. If it isnt try step 1 a couple of times. The petrol will flush any loose debris off the tip of the float needle valve. If the height is still wrong gently adjust it by bending the tag that pushes against the float needle valve.

3. With the float height correct does the carb still drip when you repeat 1? If not replace the float bowl then see if the problem is solved.

4. If the problem is still there the next step is to remove the carb, remove the pin holding the floats in and inspect and clean the tip of the float needle. Use injector and carb cleaner spray available from a car factors and a clean lint free cloth. Since you have taken out the float needle you should also take the opportunity to clean the tube that the needle sits in again using carb cleaner and cloth. Carb cleaner is nasty stuff so do it in a well ventilated area and dont get it in your eyes.

5. Put back together and see if the problem is fixed. If not the next step is to replace the float needle.

6. If setting the correct float height, cleaning and replacing the float needle have'nt solved the problem then we are into more difficult territory so post again.

Steve

 

[newguy]

so if the above does not work, I assume I should check if my floats have a leak?
mine going down steep gradients the cylinder starts flooding.

 

[bernardofeio]

"I have a broad range of footwear, all Size 10, with petrol-soaked left feet. Interested in a trade...? "

can I join the club?

is it possible to link a tube to the carb hole to avoid petrol-soaked boots?

 

[Beemerboff]

Had the same problem once, the carb had turned on the stub and was at 11 oclock instead of midnight. Putting it back vertical solved the problem.

 

[newguy]

is it possible to link a tube to the carb hole to avoid petrol-soaked boots?

Yours actually leaks through the hole? that is impressive

Mine usually just pisses past the gasket...

 

[bernardofeio]

In my situation I think that the problem is with the left float needle that sucks opened…

Than the carb floods with petrol and it pours out thru the small pipe. So if I could just link a tube to the hole I would avoid the petrol-soaked boots…

 

[Kenny]

They even do it from new

Just tickle the carb float and carry on

 

[bernardofeio]

The big problem is try to explain to my girlfriend that my new shoes are ready to go the garbage.



Last time I arrive to work with a complete destroyed shoe…