Fuel seeping from Weber mixture screw.

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MIGHTY 8
Posts: 260
Joined: Sat Mar 04, 2006 9:55 pm
Your car is a: 1980 Spider
Location: Hell's Kitchen

Fuel seeping from Weber mixture screw.

Postby MIGHTY 8 » Fri Feb 02, 2018 2:23 pm

Hi,

Noticed a seep (and Occasional drip) from 3 mixture screws after driving car. Last one towards the rear was perfectly dry.
I also noticed that after starting the engine, the problem corrected itself on two of the three mixture screws after running for a few minutes.

Any help greatly appreciated

Nut124
Posts: 30
Joined: Wed Oct 25, 2017 6:39 pm
Your car is a: 1978 124 Spider 1800

Re: Fuel seeping from Weber mixture screw.

Postby Nut124 » Fri Feb 02, 2018 3:11 pm

Replace the O-ring on the screw shank.

Nut124

sptcoupe
Posts: 984
Joined: Tue Mar 17, 2009 9:25 pm
Your car is a: 1972 124 Sport Coupe

Re: Fuel seeping from Weber mixture screw.

Postby sptcoupe » Sun Feb 11, 2018 11:13 am

Check you float levels, and make sure the fuel pressure is regulated at 2.5psi.

sptcoupe
Posts: 984
Joined: Tue Mar 17, 2009 9:25 pm
Your car is a: 1972 124 Sport Coupe

Re: Fuel seeping from Weber mixture screw.

Postby sptcoupe » Sun Feb 11, 2018 11:16 am

And while you have the carb tops off, check the size of the needle valves (should be 175 or 200), and make sure they move freely.


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