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SU carb leaking

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SU carb leaking
Tatenlyle Offline
McTavish
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Joined: Jan 2020 Posts: 15 Threads: 6
Reputation: 0
Location: Durham
Car type: Austin seven, RP, 1933ENWMk
#1
06-02-2020, 08:34 PM
I bought an SU carb last year, and fitted it to my RP with an adaptor. When I turned it over, it leaked petrol from the vent. So I bought a new needle valve and seat from Burlens, it still shoots petrol out. Do I need to fit an electric pump, and if so, what type
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Stumpi Offline
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Joined: Aug 2017 Posts: 99 Threads: 2
Reputation: 0
#2
06-02-2020, 08:43 PM
A friend recently had this problem on a 70's Midget[1 1/8su].We eventually realized the vent hole had been enlarged,this was filled with solder and a .030 hole drilled which solved the problem.
The vent hole on this carb is just below inlet and there should be a small plate covering it which is held on by the flexible fuel pipe. 
Andy
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Nigel Ricardo Offline
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Joined: Aug 2018 Posts: 190 Threads: 5
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Location: Dorset seaside
#3
06-02-2020, 08:43 PM
Are you using a Seven Workshop fuel pump?
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Tatenlyle Offline
McTavish
**
Joined: Jan 2020 Posts: 15 Threads: 6
Reputation: 0
Location: Durham
Car type: Austin seven, RP, 1933ENWMk
#4
06-02-2020, 08:48 PM
No, it's an original, works fine with the solex. The carb is an H1, with the vent below the brass screw which holds the top on
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