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Join Date: Jan 2006
Location: Millersville, MD
Posts: 505
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Zenith Carb questions...
Currently rebuilding my carbs, have two questions...
1) waynes book talks about adjusting the floats, but his book is on webers, does this also have to be done on the zeniths? and if so what is the procedure, same? 2) the first carb is took apart only had two emulsion tubes instead of three, the other carb had three, is this how it is suppose to be or do you think one was lost on a previous rebuild by someone else? how would not having three hurt the way the engine runs? sorry about all the questions but if im not going to do it right i shouldnt do it at all. thanks.
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*NEW 1969 911t targa soft window option 1967 912 Targa Soft Window 1989 911 GP White Cabriolet 1970 911t 2001 Chevy Silverado 1500 1997 Audi A4 Quattro 2.8 2003 Acura TL Type S 1973 911t 3.0 track car (SOLD) |
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02-07-2006, 05:47 PM
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Join Date: Jul 2001
Location: Wilmington, NC USA
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You should have 3 emulsion tubes for each carb. I would think the car would run poorly without an emulsion tube in a carb. It is part of the main jet circuit and is instrumental in forming the air/fuel mixture. You may not notice it at idle because the main jets aren't use when idling. Hope this helps.
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69 911 2.3Ez 85 928S |
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02-08-2006, 03:34 PM
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got the car recently, had to do some work to the fuel system, when i did get it running it did run terrible, thats why im doing the carb and engine rebuilds. when i noticed the tube missing i to thought that may be part of my problem, i have found a few problems left from the PO when he must have rebuilt them years ago. im trying to find a source for a emulsion tube, have any suggestions?
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*NEW 1969 911t targa soft window option 1967 912 Targa Soft Window 1989 911 GP White Cabriolet 1970 911t 2001 Chevy Silverado 1500 1997 Audi A4 Quattro 2.8 2003 Acura TL Type S 1973 911t 3.0 track car (SOLD) |
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02-08-2006, 05:05 PM
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Location: Wilmington, NC USA
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Actually as bad as they be on engine rebuids Motormeister has lots of Zenith parts. I got different size jets and venturis from them. The venturis are webers but they have an adapter gasket that lets the weber venturis fit the zeniths. They have a big website. Otherwise you can purchase used webers or new PMO's.
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69 911 2.3Ez 85 928S |
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02-08-2006, 07:43 PM
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Join Date: Jul 2005
Location: Glasgow, Scotland
Posts: 36
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We have a Zenith expert at our UK DDK website and he has his own website dedicated to the Zenith carb with diagrams etc. Check out his site it maybe of help (big thanks to Gary!)
http://www.gary.suggate.dsl.pipex.com/
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Brendan 1969 911T |
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02-10-2006, 11:51 AM
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Location: Mercer, PA
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I have some spare emulsion tubes.. ajkroll@aol.com
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02-10-2006, 12:12 PM
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Join Date: Mar 2003
Location: Seattle, WA
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"Currently rebuilding my carbs, have two questions...
1) waynes book talks about adjusting the floats, but his book is on webers, does this also have to be done on the zeniths? and if so what is the procedure, same?" I think you use paper washers to shim the fuel inlets in order to set the float bowls. The more washers you use, the more fuel in the bowls. You will also need a float bowl tool to measure the amount of fuel in the bowls. The Zenith floats are very different from the webers. Alan 206AA 1979 911 SC Couple Last edited by 206aa; 02-10-2006 at 08:03 PM.. |
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02-10-2006, 07:10 PM
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Join Date: Feb 2005
Location: Jupiter, FL
Posts: 306
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As I recall the same float level tool can be used on Webers and Zeniths. This is the tool that screws in at the bottom of the float bowl so you can see the fuel level.
The link from bjmullan (above) has copies of the factory manual which tell how to adjust the level. Lyn
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Track: 91 C2 SuperCup wannabe, 08 Cayman S Street: 85 RUF BTR Slant-nose, 70 911 T Coupe Pastel Blue Projects: 82 911 SC 3.6, 72 911 T Coupe, 74 914 Signal Orange |
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02-10-2006, 07:51 PM
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