Carburettor overflow pipe

[Chris Edgar]

The carb on the Tourer ( Marina engine, larger carb) has an "overflow" pipe fitted from the float chamber....

is there any point in this?

Doesn't seem so to me, never seen one before & it surely will allow evaporation of the fuel especially when all is warm
Would it not be better plugged?

Chris

[PSL184]

It's more a vent than an overflow. I just run a pipe safely away from the exhaust down the bulkhead. not wise to block it off completely.

[bmcecosse]

Certainly DO NOT block it!

[Chris Edgar]

Thanks for the quick replies!

Yes, the pipe does run well clear of the exhaust
and
No, clearly I should not block it...so I won't

thanks again

Chris

[beero]

My MGB has these and when your float chamber needle sticks you will find out how useful they are. They pour petrol on the floor instead of in your engine bay.

[Stig]

Keep petrol well away from the wheels, it's quite a lubricant. My brother had a faulty needle valve on a carb in his Midget once, went straight at a roundabout (at low speed) and bounced off two kerbs ending up with three flat tyres - not a happy bunny!