Classic cars forum & vehicle restoration.
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TriciaS
Joined: 17 Nov 2016 Posts: 63
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Posted: Tue Feb 21, 2017 1:40 pm Post subject: Flooding - Carburettor 34IV Zenith |
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Hi,
I am hoping for a miracle, I have tried replacing all but the actual carburettor and yet it is still flooding, 3 floats - 2 needle & Seats - fuel pump - gasket sets - cleaned jets - what else is there.
when first got the car it was flooding out the overflow only, now it is flooding out the overflow pipe and the breather at the top of the carb, cleaned all parts several times.
Any info as to what else can cause this flooding greatly appreciated . |
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mikeC
Joined: 31 Jul 2009 Posts: 1776 Location: Market Warsop, Nottinghamshire
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Posted: Tue Feb 21, 2017 2:15 pm Post subject: |
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It sounds like the fuel level is too high. I'm not familiar with this particular carburettor, but I imagine there is some means of adjusting the float level? _________________ in the garage: 1938 Talbot Ten Airline
Recently departed: 1953 Lancia Appia, 1931 Austin Seven, 1967 Singer Chamois, 1914 Saxon, 1930 Morris Cowley, 1936 BSA Scout, 1958 Lancia Appia coupe, 1922 Star 11.9 ... the list goes on! |
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TriciaS
Joined: 17 Nov 2016 Posts: 63
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Posted: Tue Feb 21, 2017 4:24 pm Post subject: |
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mikeC wrote: | It sounds like the fuel level is too high. I'm not familiar with this particular carburettor, but I imagine there is some means of adjusting the float level? |
Hi,
Thanks for reply, I have adjusted the float level, only thing might be different is the new floats are not exactly the same as the old one, supposed to be new old stock for my carb so when it says to measure from gasket to top of float 31mm would that be different if new float is not as bulky as the old one, even zenith website has new shape ones and do not say to do a different measurement but I have tried a mm or 2, either way, to see if any improvement |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22454 Location: UK
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TriciaS
Joined: 17 Nov 2016 Posts: 63
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Posted: Tue Feb 21, 2017 4:57 pm Post subject: |
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Rick wrote: | It does sound like fuel level.
Also, is the replacement fuel pump to original spec? I've read of people fitting new electric pumps to cars that don't usually have them, and the pressure can be too high unless a pressure regulator is included upstream of the carb.
RJ |
Hi,
Thanks for reply, new pump is again new and is for my carburettor, not electric as trying to keep everything original, have just retested 3rd float in warm water and it is showing a couple of bubbles where plastic joins metal, compared to last 2 floats it seems hardly anything but could that let in fuel and start flooding within 2 mins of starting the car, I have decided to try sealing the edge where bubbles are with fuel resistant sealant and hope to try again in 3 days when completely cured |
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trampintransit
Joined: 09 Aug 2010 Posts: 166 Location: Edinburgh
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Posted: Sun Feb 26, 2017 1:06 pm Post subject: |
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Fuel resitant sealant? Hmmm ... potentially unrelaible methinks. Try using a soldering iron on a plastic flaot ...see if you can hot seal it? _________________ '60 Armstrong Siddeley Star Sapphire
'80 Reliant Scimitar
'47 Jaguar MKIV --- in bits!!!! |
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D4B
Joined: 28 Dec 2010 Posts: 2083 Location: Hampshire UK
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Posted: Sun Feb 26, 2017 10:02 pm Post subject: |
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Not sure if this booklet might assist you, not greatest pics as they
are photos rather than scans.....
Despite my best efforts, I bet these come out upside down!! |
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D4B
Joined: 28 Dec 2010 Posts: 2083 Location: Hampshire UK
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Posted: Sun Feb 26, 2017 10:04 pm Post subject: |
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thought so |
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