Posted by jimg.allentown on November 30, 2020 at 18:30:10 from (24.115.204.152):
In Reply to: Farmall 300 missing posted by bpanning92 on November 30, 2020 at 08:56:46:
OK, let's get a couple of things straight here.
Points affect ALL cylinders - not just one or two. Same with condensers. Same with distributor bushings. So, now let us get back to basics.
An engine needs THREE things to run: 1) Fuel/air mixture. 2) properly timed spark. 3) Compression.
If you have those three things, the engine will run. Now, as to what is missing. You say that it runs on 2 and 3 but not 1 and 4. That tells you that it is something that is NOT common to the whole engine. That rules out points, condenser, coil, and distributor bushings. It also rules out timing.
You already did say that you have spark at 1 and 4. Check under the cap first to see if there is any moisture or carbon tracking. Then it is time to check for vacuum leaks. With the engine running, spray a bit of carburetor cleaner or starting fluid around the intake manifold. Any sudden change in engine RPM while you are spraying will indicate a vacuum leak.
Next, check your compression. Usually, just listening to the sound as the starter turns the engine will tell you if there is a compression problem. Better to use a gauge, but in a pinch, just using the starter will point out an obvious difference in compression. You should hear a steady loading and unloading as each cylinder passes over TDC on the compression stroke.
There are a number of things that can cause a cylinder to misfire. Spark plug, plug wire, carbon track in the distributor cap, Valves adjusted too tight, burned valves, vacuum leaks, crossed wires, head gasket, and the list goes on. But, those are the major things that will cover most misfiring problems. You need to look for something that is specific to each cylinder that is not firing. Not something that is common to all cylinders.
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 - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
... [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.
