Posted by Steve@Advance on March 05, 2016 at 08:33:47 from (107.203.134.67):
In Reply to: Farmall m posted by Rkbenish on March 04, 2016 at 21:04:56:
That it will only run fully choked is an indication of too lean. Could be a restriction in the main jet circuit, low float level setting, restricted fuel flow to the bowl, missing or improper part assembly.
There is a plug in the bottom of the carb. With the fuel valve on, remove the plug. There should be a full stream flow until the bowl begins to empty, then slow to a trickle. If it stops or slows to a drip, there is a restriction between the tank and the bowl, or the float level is too low. Catch the fuel in a clean glass, look for contamination or water settling to the bottom.
All fuel passes through the main jet. The flow is then divided between the idle circuit and the power circuit. Since it trys to idle, that circuit must be getting some fuel. Look at the power circuit, the brass tube that extends into the center of the venturi ring. Be sure the tube is in place and is open, be sure the venturi is in place and is not upside down. It may go in either way, but will only fit properly one way.
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