> Surging usually indicates a blocked idle circuit.
Thanks! I was thinking that should be my next thing if cleaning up the fuel supply doesn't solve the problem. Given the missing fuel screen at the sediment bowl and a little crud I found in the carb filter I guess it's possible that even a new carb got something in that main circuit.
As I mentioned before, the carb filter is noticeably shorter that my others, almost like it was cut down. I wonder if that could restrict fuel flow as well (I have a new one coming).
I'm still curious about the issue of the economizer jet possibly being oversized. If I do end up removing and disassembling the carb I wonder if I should check the jet sizing, but I'm not sure how to do that (or where to find a correct jet, short of buying a whole deluxe rebuild kit).
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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