Did you see any reason for the ex valve to loosen?
If the jamb nut was left loose, that is an obvious and correctable reason. But if the adjustment was still where it was set, and there was a major change in the lash setting, the change had to come from somewhere.
A bent pushrod is easy to determine, just spin it and watch for wobble.
Also check for a broken valve spring, or a sticking valve.
Another cause though can be a valve seat loose and falling out, holding the valve down. Sometimes they will go back in place temporarily then come out again.
Doing a compression test will show some loss if the seat is loose, total loss if it comes out.
As Janicholson said, check the distributor bushing, point condition and gap. Check for spark quality at the plugs.
There is a drain plug in the bottom of the carb. With the engine off, fuel valve open, pull the plug and catch the gas in a clean glass. The flow should be a solid stream, slow to a trickle as the bowl empties down, but continue to flow as a trickle, not stop or slow to a drip. Look at what was caught, check for water or trash. If contaminated, the tank may need to be cleaned, whatever was in the glass will also be in the carb.
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.
