Your needle valve must be a smooth surface where it seats as well as a nice smooth surface in the carb housing where the needle valve seats down. The biggest problem with these carbs is the WRONG float setting. DO NOT use the setting provided in the carb kits. those settings are way wrong and will cause flooding and running problems like crazy. The correct setting is right in the fuel bowl and is a machined groove that goes all the way around the inside of the fuel bowl. Set the float to that line and it should run great if the suction tube is in good shape. The mixture adjustment is the knurled knob on the top and must have the little spring to keep it in place or it will vibrate and change the setting. The copper tube is nothing more than a fuel bowl vent and if it is leaking fuel into the air intake, the float is set wrong, or the needle and seat are not clean or making a good seal due to wear.
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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