Posted by Steve@Advance on December 25, 2022 at 08:36:23 from (99.190.215.237):
In Reply to: Carburetor posted by WW2N on December 24, 2022 at 16:40:23:
I've seen pictures and diagrams of the power jet, buy have never opened one up and found it!
Yes, the power adjust controls the flow of fuel through the main jet, which in turn flows through the nozzle and into the engine. All fuel passes through the main jet.
The upper adjustment is the idle mixture. Turning it in richens the mix as the needle regulates air bleed. The engine needs to be idling very slow, down around 400 RPM for this adjustment. Adjust it for the smoothest idle.
Then adjust the power jet. This adjustment controls fuel flow, so turning it in leans, out richens the mix. Start with it about 1 turn off (gently) fully seated. With the engine at idle, suddenly open the throttle and observe the response. If the engine revs without hesitation, turn the screw in 1/4 turn and try again. If it balks, back the screw out 1/4 turn. Keep repeating the test, each time letting the engine return to slow idle. When the mix is correct, the engine will take sudden throttle without hesitation. A single puff of black smoke is acceptable.
But before doing any carb adjustments, everything else must be right. The engine must be properly tuned, air cleaner serviced, valve lash set, thermostat working and up to temp, no vacuum leaks. An engine down on compression, or any other problems, will not run properly under even the best adjustments.
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. 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 - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[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.
