Posted by Steve@Advance on August 25, 2018 at 19:03:55 from (66.169.147.211):
In Reply to: Installing carb posted by Abane on August 25, 2018 at 18:33:47:
Are all the gaskets the same size?
It should only need one.
Are you saying the idle mixture won't adjust? As in turning the screw in or out has no effect?
A carb can only work as well as the rest of the engine.
Is the engine properly tuned, plugs, wires, points, timing, cap and rotor, etc?
Is the compression good, valve lash adjusted properly?
Has the air cleaner been serviced? There is also a wire mesh above the oil cup that occasionally needs cleaning. Check the entire tube for mud dobbers and mouse nests.
How is the fuel? Fresh, clean, rust or trash in the tank? Anything in the tank will get in the carb. Even if new it only takes a tiny speck of rust to foul the carb.
Now, back to the carb...
Make adjustments with engine up to operating temperature, verify choke is fully open.
Things that will prevent idle adjustment:
Most common is idling too fast. The idle needs to be down around 400-500 RPM.
Vacuum leak. Any obvious vacuum leak, or in rare cases some manifolds can burn through internally between the intake and exhaust.
Clogged idle circuit, or wrong gasket between the top cover and the bowl. Idle fuel gets drawn up the hole beside the throttle bore. If the gasket is wrong, or the cover doesn't fit tightly it will not draw up idle fuel. The idle jet is very small, doesn't take much to clog it.
Not sure what carb you have, but most updrafts adjust backward from modern carbs. The idle screw regulates air, not fuel. Turning the screw in closes the air bleed and enriches the mix. Backing it out increases the air bleed and leans the mixture.
Upload one or more videos to your post. Photo filesizes should be less than 300K and Videos, less than 2MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
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 - Talk of the Town: Winterizing Engines - To Drain or Not to Drain? - by Russ Berry. What is this strange attraction I have to equipment and machinery? How did I get this way? I came from the suburbs and own a small horse farm in rural Loudoun County, Virginia. You can call me a "weekend farmer." The local farmers do. Does it bother me? No. I am just happy to have their friendship. At least the word "farmer" is in my title. But what is the attraction? How can I explain the sensation and exhilaration I feel when I turn the key and hear the engine come to life (most
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
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.
