Posted by used red mn on July 15, 2020 at 17:49:37 from (75.73.112.20):
In Reply to: Carburetor posted by Metal Man on July 15, 2020 at 09:20:35:
I have an old needle seat here out of an M Farmall, which shows a stock horsepower of 35. It has thin wall sleeves and over bore piston with fire crater higher than stock compression pistons. I think it puts out every bit of 45 hp. The same basic carb fits on a Farmall 450 which is factory rated at 48hp. I believe you have 641 Ford which I also believe is rated at 48 hp. The opening in this needle seat is 3/32” so in theory that size hole should support 50 hp of required gas flow. So my question is how much gas flows out of the line when unhooked from the carb? If you still get the half cup in 5 minutes there is something wrong in your fuel supply. Now when you say a half cup I take that to mean a measure cup; 8 oz.. If it runs slow out of the line even though you feel you cleaned it well, there may be some crud in the tank you missed. I would look in the tank where the fuel exits and make sure it is clear. Did you by chance add an inline fuel filter? If so some of them do not work well with gravity flow systems. As far as setting the float level most carb rebuild kits have instructions with details telling you how to measure and what the setting should be. I even got a cheap Tractor Supply kit for my M and it had instructions in it. Hope this helps.
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