Black smoke is too rich, as in the carb flooding or the float set too high.
White smoke can be several things.
Coolant in a cylinder, sweet smelling water vapor, indications of a head gasket, but would be accompanied by overheating and coolant loss.
Raw gas vapor, eye burning, strong gas smell, indication of loss of spark or compression on one or more cylinders.
No smoke, just rough idle that clears up with higher RPM, can be carb out of adjustment, minor vacuum leak, minor compression loss (check valve lash), points adjustment, ignition timing, etc.
Based on these observations, you can make a better diagnosis.
Do check the points gap, check the distributor shaft for side play, try an old condenser, check the electrical connections, especially from the coil to the points.
If there is black smoke, revisit the carb, could be the float has a leak and partially sunk, trash holding the needle valve open (a contaminated, rust flaking tank will be an ongoing problem).
If no black smoke, try adjusting the idle mixture, turning the screw in richens the mix, out leans. The idle speed must be down to 500 or less for the mixture adjust to have any effect. If it still has no effect, the idle circuit may be clogged.
Tight valves will get tighter as the engine warms. If they haven't been adjusted lately, might give them a run.
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 - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[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.
