Posted by mmfan55 on December 03, 2020 at 15:37:39 from (174.246.139.54):
In Reply to: Farmall 400 Update posted by super99 on December 03, 2020 at 04:22:05:
Slow ignition timing can cause problems similar to yours. Your engine is not in bad shape. Many of the older tractors ran 50 to 80lb. compression. Also, your oil add test is good. If you have access to a dwell meter, hook it up and run engine through the rpm range to be sure you don't have a distributor issue messing with point adjustment. Point adjustment will affect timing Otherwise, possibly hotter plugs or a little higher octane gas. Gas should not make a difference, but, if I run Lower octane fuel in my pulling tractors than was used to tune them out, I will get some black smoke. Sounds like it is something that you have overlooked
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