Posted by WayneMo on November 08, 2011 at 14:32:59 from (99.108.28.182):
My Ford 3000 3cyl starts good with choke all the way out but then requires the choke 1/3 to 1/2 way out in order to drive or pull. It sputters if the choke is not out. I have new plugs and points and also went through the Holley carb and did not find anything unusual when cleaning it. It seems like a big vacuum leak somewhere. The gas flow from the pump is fine. I suspect the problem is related to the brass vacuum piston accelerator pump. It did not look worn but then I do not know how tight it is supposed to fit in the aluminum carb body bore. There seems to be a lot of complaints with this carb related to a vacuum leak type condition. I wonder if anybody has really determined what is actually going on. I bet the thing would run better if the vacuum accelerator pump piston was completely sealed so as to prevent any vacuum leak there. In other words run without any accelerator pump at all! If it was not so difficult to remove the thing I would try that! The other strange thing was that there is a rubber disc in mine that is located where the pump piston lands when the spring forces it down under low vacuum condition. It is just freely positioned in there and free to flop around when the piston is held up against the spring under high vacuum condition. This disc is not shown anywhere on the parts diagram. It does seem to be the same diameter as the recess machined in the pump piston face as if it were meant to be held in that recess, but there is nothing to hold it in that position. Sorry to ramble on so much but I am hoping someone out there has figured this out and I wanted to provide all the info I had.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
... [Read Article]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
