Looking in the engine bay the other day, I realised that the webber was leaking fuel out of a blocked off hose. I thought the hose was worn so put a new piece of hose on there but it didn't fix it.
I suspect that there is a large amount of pressuring building up and forcing the fuel out

Anyone have any ideas? Should there be a blocked off hose on the webber? =/

Pics of the hose. Done carbs have an.overflow Return line. Need to work out what you have.

Could be tank.pressurising in. The heat, make sure your cap still vents at the fuel filler too.

If you are using a regular fuel pump for a Weber, it is only 3.5 psi -- not high pressure. No return line is needed.

What sort of weber?
If its a downdraft DG#V it may have a loose/leaking pressed in fitting into the alloy body. If so then get it removed and the hole tapped for a threaded sealing plug.

These suckers can and do fall out and spray raw fuel on your exhaust manifold. Not good.

BTW - Webbers are in Red Bull F1 cockpits. Webers mix fuel and air.

I took the hose off and took a photo

Attach file:

---

  20130222_152908_1.jpg (102.73 KB)

Looks like fuel return line to me. So the float in the carb must be set high and unused or excess fuel in the bowl is sent back.

Dodgey way is to block it or cut a t peice into the fuel hose to create a loop. The factory dual line rail does this too, but you would be replicating same thing.

Look like a Weber 32/36. Where is the leak?

Most 32/36 do not have the straight brass fitting. It may be a return line or a breather line.

If your fuel pump is putting out over 4psi that is the problem. Below the pressure that a return line is unnecessary.

Attach file:

---

  3236DGV-1.jpg (137.87 KB)

OK, found this:

The return line has a smaller hole than the fuel inlet line, so don't get them mixed up! Most Webers do not have provision for a return line, as the 32/36 does not need it. Keep the fuel pressure to the Weber-specified and you won't need it either. It is only used in emission-controlled versions.

So if I block the return hose off again, it should be okay? It was blocked off before but leaked. Is there anyway I can send the fuel back to the tank?

I'm new to all this lol
Thanks guys

It should be OK blocked off -- if the fuel pressure is low enough (weber says 2.5 to 3 pounds). Most troubleshooter vacuum gauges can measure fuel pump pressure, so check it! High pressure can cause intermittent issues besides leaking.

If the fuel pressure is ok, put a cap on the brass fitting along with an appropriate size hose clamp.


> Is there anyway I can send the fuel back to the tank?

If you add a return line to the fuel tank, sure.