Nothing jumps out at me - but black smoke sounds like it's getting plenty of gas into the cylinders - if not too much - just not burning properly.
(I'm assuming you've tried this without the air cleaner attached - and ruled that out for blockage - if not - try that first.)
My first guess would be that you're flooding - but typically once you get it to start after flooding they usually stay running ok.
Does the carb drip gas at all?
Could also be a weird combination of flooding - and restricted fuel from the tank. Make sure you have a solid stream TO the carburetor.
Also sounds ignition related - where you get fuel but it doesn't burn right - but assuming all those components were good to begin with - as in it used to run fine?
Might want to at least go over everything on that side - clean your points - make sure your cap is dry, etc.
Not sure about adjusting valve lash on a cub - but if it's something you can do - I'd recheck that.
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 - A Cautionary Tale - by Ian Minshull. In the early 1950s my father bought an Allis Chalmers B and I used it for all the row crop work with the mangolds and potatoes, rolling and the haymaking on our farm. The farm and the Allis were sold and I have spent a lifetime working on farms throughout the country. I promised myself that one day I would own an Allis. That time event
... [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.