E: Engine Fuel leakage

[Ernesto]

After almost 20 year of stop of my Comet and some main jobs done last months (new tire, battery, repaint tank, and other), I finally have done first ride round the building today.
All fine and super!!!
One's I come back and line the bike on the left stand I notice fuel leakage from the carb.
It look to come from the bottom crowed of the carb ( where the separate float is connected), just under the main body. Is there a gasket?
Could be something else?
Advices?
Thanks.

 

[Bill Thomas]

Yes Ernesto, There is a washer, If it's the wrong thickness it can upset the running,
Also if you tip the carb it might alter how high the float is,
Could be just float valve dirty or sticking ?.
Well Done for the build, Cheers Bill.

 

[Bill Thomas]

 

[bmetcalf]

See Part #PR5AP here: https://vocspares.mamutweb.com/Shop/List/Carburettors-and-Spares/30/3

looking at http://amalcarb.co.uk/?___store=amal the Rap and Shadow/Comet carbs seem to take the same float chamber gaskets. The VOC Spares Co can advise, I'm sure.

 

[Ernesto]

Yes Ernesto, There is a washer, If it's the wrong thickness it can upset the running,
Also if you tip the carb it might alter how high the float is,
Could be just float valve dirty or sticking ?.
Well Done for the build, Cheers Bill.

Yes, could be.
I was thinking to replace the float valve idle and may be the seat too.
I'll try to line the bike on right stand and see if leakage change too.
do you have or know where to found parts catalogue for the carB?

 

[Bill Thomas]

I can't find a catalogue for the old carb',
But as Bruce says , Give the Spares Company a ring ?.

 

[Ernesto]

i

I can't find a catalogue for the old carb',
But as Bruce says , Give the Spares Company a ring ?.

I'll do.
thanks

 

[Bill Thomas]

Partsfor229F/1DV for Vincent Comet 499cc O.H.V. | AMAL Carburetters

Default Description

amalcarb.co.uk

Scroll down, Bill.

 

[ray vinmad]

First thing to try is lower the float chamber by rotating the carb slightly.
After years of having a leaky front carb on my twin, it was cured in less than a minute!
Ray

 

[TouringGodet]

Another trick is to shut off the fuel petcocks as you are approaching your destination, to use up some of the fuel in the float bowls. As long as my petcocks are working, I’ve never had issues with fuel leaking out of the carbs when using the side stands.