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Greetings from the UK Unlike the Czech poster we have a Stewart Vacuum Pump fitted to the car. A previous owner has fitted a 6 volt petrol pump together with a pressure reducer supplying the Stewart unit, and has blocked off the inlet vacuum pipe at the manifold. Our intention is to get the Stewart unit operational again. The model number isn't clear on the unit body, but it states it was patented Feb 14th 1911. We've dismantled it and the innards look in good working order. What we can't figure out is the reason for two vacuum line connections on the lid of the pump body. One (nearest the edge) seems clearly to be for sucking from the inlet manifold. The other (which has been blanked off at its outlet on my car) is nearer to the middle of the pump lid) has an internal valve which works simultaneously with what we take to be the main vacuum line. What does it do? Why is it blanked off on my car? What if anything do we need to connect it to? Any help would be welcome! John Keith, Cumbria on the Scottish Borders, UK Restoring 1902/3 Oldsmobile, 1926 Chevrolet 4 door 5 seater convertible), 1928 Austin 7 Chummy, 1932 Triumph Southern Cross 4 seater Sports, Unique 1934 Triumph Super 9 Pillarless Saloon by Salmon (later Tickford and Aston Martin), 1972 Tatra 603-2. Running 1967 Triumph Vitesse 2 litre straight 6 convertible.
<TABLE class=tborder2 id=post678128 cellSpacing=1 cellPadding=6 width="100%" align=center border=0><TBODY><TR vAlign=top><TD width=175> Join Date: Jul 2009 Location: midland Texas Posts: 7 </TD><TD class=alt3 id=td_post_678128><!-- google_ad_section_start -->1923 Buick Stewart Vacuum Fuel Pump<!-- google_ad_section_end --> <HR SIZE=1><!-- google_ad_section_start -->I have a fuel starvation problem in my 1923 Buick that uses a Stewart Vacuum fuel pump. I have replaced all gaskets abd throughly cleaned and installed new springs in the Fuel pump. I have completley dissabssembled the Marvel carb ,replaceed float and all new gaskets. Fuel tank has been completed refurbed with internal coating. I have been testing with the gas cap off as I though my problem was related to venting. Anyways.. I prime the fuel pump with a few cups of fuel. The car runs great for about 5 minutes then runs out of gas doesn't appear to be sucking gas from tank. Any suggestions? </TD></TR></TBODY></TABLE>