Leaking Carb

sprie · May 14, 2024

I have been fitting the accelerator linkage from the pedal to the carb, and doing this I pushed the pedal a few times to test (with the engine off).

I can see some fuel escaping from the Weber carb. I had seen this previously and had carefully replaced the diaphragm, using a bit of sealant on the edges. I don’t think it is leaking from the edge of the diaphragm.

Where do you think the fuel is leaking from and what can I do about it – with this amount of fuel, I don’t think I can test run the engine again, as I don’t want any fire ruining my hard work.

kermit_rr · May 14, 2024

do you mean you replaced with a new diaphragm, or used the old one with sealant?
it looks like it could be leaking, they can split and/or go porous. spray with some carb cleaner and get it nice and dry, then operate the pump by hand and hopefully you'll see a telltale

sprie · May 14, 2024

kermit_rr said:
do you mean you replaced with a new diaphragm, or used the old one with sealant?
it looks like it could be leaking, they can split and/or go porous. spray with some carb cleaner and get it nice and dry, then operate the pump by hand and hopefully you'll see a telltale

I replaced it with a new one

marjon · May 14, 2024

It does look like its coming out at the diaphragm area.
As above give it a clean so its dry.
We cant see the top of the float bowl seal.
You say "engine off" but did you turn on ignition to prime (Do you have electric pump).

J

sprie · May 14, 2024

marjon said:
It does look like its coming out at the diaphragm area.
As above give it a clean so its dry.
We cant see the top of the float bowl seal.
You say "engine off" but did you turn on ignition to prime (Do you have electric pump).

J

I will investigate tomorrow. As part of the restoration I did renew the diaphragm and seals on the pump and I know it produces fuel at high pressure as it leaked or of the

sprie · May 14, 2024

sprie said:
I will investigate tomorrow. As part of the restoration I did renew the diaphragm and seals on the mechanical fuel pump and I know it produces fuel at high pressure as it leaked out of the old hoses before I replaced them.

boguing · May 14, 2024

Don't forget that you can manually operate the fuel pump to simulate running.

kermit_rr · May 14, 2024

A carburettor doesn't take high pressure at all. What pump do you have,?

sprie · May 18, 2024

i have the original mechanical pump.
Now that i have started investigating, it has stopped leaking. I am sure it will come back soon!

kermit_rr · May 18, 2024

I wonder if the float shut off has been sticking, allowing it to flood? Bit of dirt maybe

Leaking Carb

sprie

Active Member

Attachments

kermit_rr

Very

sprie

Active Member

marjon

Well-Known Member

sprie

Active Member

sprie

Active Member

boguing

Well-Known Member

kermit_rr

Very

sprie

Active Member

kermit_rr

Very

Similar threads