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Re: [Mgs] MGB evaporative loss system

To: Robert's New iPad <mgbobh@gmail.com>
Subject: Re: [Mgs] MGB evaporative loss system
From: Allen Hess <allen.k.hess@gmail.com>
Date: Fri, 21 Aug 2020 21:27:26 -0400
Cc: Hans Duinhoven <h.duinhoven@planet.nl>, mgs@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: mgs@autox.team.net
References: <02DD03EB-8046-4E0A-982F-43AB42CDA0CA@gmail.com>
I havenâ??t checked the fuel separator line in the way you suggest so Iâ??ll do 
that. 
Thanks 
Allen

> On Aug 21, 2020, at 7:21 PM, Robert's New iPad <mgbobh@gmail.com> wrote:
> 
>    More than a few have made the mistake of putting hoses onto the wrong 
> pipe.
>   Allen, when you checked that pipe to the fuel separator in the boot, did 
> you blow down it from engine space to the boot, listening for bubbling in the 
> fuel tank? Gentle lung-power should be all you need for that. If you do not 
> hear the bubbling and feel pressure in your cheeks, that line is not 
> adequately cleared.  It gets a crud of stale gasoline and rust that can be an 
> effective plug.  
>   I have never thought that John Twistâ??s purging of the charcoal was worth 
> the bother. I prefer to get fish aquarium charcoal at the pet department and 
> to replace that disintegrated rubber filter with a piece of Scotchbrite.  
> Bob
> 
> 
>> On Aug 21, 2020, at 1:54 PM, Hans Duinhoven <h.duinhoven@planet.nl> wrote:
>> 
>> As the '71 B still is equipped with the HS4 carbs, it may be wise to verify 
>> how the top lids of the float chambers are looking. The evaporate loss pipe 
>> and the fuel inlet are located pretty near each other. Check for correct 
>> working of the floats and check  if the needles are closing the fuel inlet 
>> correctly.
>> Your story looks, if the pumps does not stop timely when the float chamber 
>> has reached its correct level of fuel.
>> When that happens, the float chamber gets overloaded and the excess fuel 
>> will be fed into the charcoal canister.
>> 
>> Hope this helps.
>> 
>> Cheers,
>> Hans '71 BGT NRG W/W
>> 
>> 
>> 
>> -----Oorspronkelijk bericht-----
>> Van: Mgs [mailto:mgs-bounces@autox.team.net] Namens Allen Hess
>> Verzonden: vrijdag 21 augustus 2020 16:17
>> Aan: mgs@autox.team.net
>> Onderwerp: [Mgs] MGB evaporative loss system
>> 
>> 71 mgb. A few years ago after the first startup in the Spring, I drove 
>> around the neighborhood to check things out. The car bogged down and I 
>> struggled to get home. Fuel had filled the charcoal canister and running out 
>> the bottom. The original floats showed some wear on the pivots, but not so 
>> much that I thought it would be the problem. Couldnâ??t find anything else 
>> so replaced the floats and valves and it has been fine since. This year I 
>> didnâ??t start up until May or June, same thing happened. 
>> 
>> Checked everything, no blockage, debris, worn parts. An internet posting 
>> mentioned the pipe union (near the fuel pump) that connects the charcoal 
>> canister to the â??widgetâ?? in the trunk. That too was clean. Purged the 
>> charcoal of gasoline (see John Twist) put it all back together. Fuel pump 
>> ticks briskly and stops before starting. Iâ??ve driven around the 
>> neighborhood a couple more times and it seems fine. Not being able to find a 
>> cause and fix it leaves me worried about longer drives. Any thoughts?
>> 
>> Allen
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