Posted by farmallhal on October 16, 2009 at 19:03:52 from (76.4.163.116):
In Reply to: 52 M Carb Problem posted by Bemidji 52 M on October 16, 2009 at 15:50:28:
I just worked through the same problem on my Farmall H. After talking to a couple of local tractor type mechanics I was told one of the problems leading to this problem is that the surface on the float where the needle valve contacts the float over the period of time these tractors have been around and used wear a small indentation on the float. This indentation causes the needle valve to go to a certain spot and prevents it from sealing off the flow of fuel in the valve seat. I was told to burnish that area smooth using very very fine grit material. I was lucky and found a NOS float at the RPRU this summer so I just replaced it. It was in fact worn in a specific spot. I also replaced the needle valve and seat at the same time and I now have a very smooth running H. Not a hard task as the carb is very simple. Another thing to look for is make sure the float is not rubbing on the side of the bowl and doesn't have a hole which will cause it to sink over time. That might be hard to visually notice though. Hope this helps, Hal.
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