One important question, did this just start happening, or was something, even seemingly insignificant, changed? Why was the carb off, to fix this problem, or another reason?
Agreed with what the others have said - but I do think it's important that it runs smoother under load.
That generally means the governor is opening your carb further to keep the same RPM level.
So, if opening the carb smooths the engnine out -at that same rpm level, it makes me think the problem is carb related.
Cleaning a carb thoroughly doesn't necessarily mean it's going to work perfectly.
I'd go through what others have said, and check/fix the easy stuff, especially the points, and checking the advance.
But I wouldn't cross the carb off the list as a known good.
I'm not familiar with the carbs on the 400, but I'm assuming there are some tolerances here or there worth checking on it.
If you come back to the carb, I'm sure others here could give you some pointers one what too look at.
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 - Trenching With a Plow - by Staff. Introduction: This interesting information came from one of the discussion forums here at YT. We thought we should place it up front so it could be read by anyone interested in putting old iron to work. [Editor] I tried something new today, and it worked so well I thought I should post it - in case it might help someone else. I'm running 100 yards of 4" drain pipe from the gutter downspouts of our house to a pond down the hill. This should hel
... [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.
