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Bill_MN 
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Joined: 12 Sep 2009
Location: Sioux Falls, SD
Points: 1471
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 Topic: ? for carb experts
Posted: 11 Jun 2015 at 9:04pm |
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Is there a conversion for numbered venturi sizes? What is the ID of a #29 venturi? Reason I'm asking is I found a possible replacement for this Rumely carb and the venturi is listed as 29/32 ID while the carb specs say it takes a #29 venturi
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1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow
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Leesok
Orange Level Access
Joined: 11 Sep 2009
Location: OK
Points: 517
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Posted: 11 Jun 2015 at 10:42pm |
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Not an expert, all trial and error here. Had a feller tell me once that the number on the Venturi is the size of the opening in 32nds. Have drilled out a few distillate accordingly with satisfactory results.
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Bill_MN
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Joined: 12 Sep 2009
Location: Sioux Falls, SD
Points: 1471
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Posted: 12 Jun 2015 at 3:47pm |
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That would make sense, originally I was thinking it was mm but that seemed too big. I'll have to measure the old one to know for sure but I was still curious.
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1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow
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Matt (Jordan,MN)
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Joined: 12 Sep 2009
Location: Jordan, MN
Points: 3800
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Posted: 22 Jun 2015 at 12:43am |
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Did you find a replacement venturi? I am now in need of one for my Waukesha 6bk. If you didn't find one I may be trying to fabricate one. Matt
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Owner of Matt Scott LLC
Specializing in NOS and used Allis Chalmers tractor & implement parts & liturature and Magneto Repair
http://www.mattscottllc.com/
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Bill_MN
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Joined: 12 Sep 2009
Location: Sioux Falls, SD
Points: 1471
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Posted: 22 Jun 2015 at 4:09pm |
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No I haven't, McDonald has a venturi for a Zenith 267 that is 29/32 ID and looks similar to mine, might fit with some mods. I measured mine though and the ID is 1.030. I can bring my old one up when I bring that magneto and you can take some measurements, I'd guess the 6BK one would be similar. I'd be interested if you can make one. Are you around July 3rd?
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1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow
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