I am very thankful that I ran across this thread. I recently purchased a David Brown 885G tractor, with loader and in good condition. There was one major problem, a terribly flooding carburetor (Zenith 34IV)! After reading this thread, I purchased a reproduced Zenith 36IV carb from Ebay (copy the following listing and paste in Ebay: Zenith 36IV Carburetor 2 1/4 2.25 Petrol for Land Rover Series 2,2a 3). The carb arrived much sooner than I had anticipated and after altering one piece of linkage, it worked perfectly. Now, the ole 885 starts without choking and runs like a charm. Thank you all and thank you TractorByNet.com.