8n Stalls Running on Hillside

I replaced the old carburetor (Zenith) on my 8N with an aftermarket carburetor based on the Marvel Schebler TSX from Tractor Supply. The tractor runs really nice except when I am on a slope of about 30 degrees (downhill side to the left). Then the tractor begins to stumble and will stall. It appears to me that the carburetor is flooding because once I get the tractor more level I can restart, usually with a cloud of dark smoke. I have taken the carburetor apart and the float seems to be ok. It is just a hair less than 1/4" from the gasket to the float. The float valve needle does not show any wear whatsoever. I did notice that the roll pin that the spring around the choke shaft fastens to was apparently sheared off somehow, and that spring just hangs loose. However, I can use the choke as needed without any problems obvious to me. It starts fine in cold or warm weather using the choke appropriately. I really am frustrated with trying to diagnose the problem. Is there something else I should check, or does this require a complete rebuild? I have only about 30 hours on this carburetor.

Any suggestions I can try would be greatly appreciated.
 
Tom.......you complain......"The tractor runs really nice except when I am on a slope of about 30 degrees (downhill side to the left). Then the tractor begins to stumble and will stall".......geeze, wonder you don't roll-over!!!

Then you admit the float is "just a hair less than 1/4" from the gasket to the float".......so......make it a "hair-more"......'nuttin sacred about 1/4", try 5/16". Simple, eh? .........the amazed Dell
 
Float adjustment is too high.

Float adjustment is made with gasket in place.

Dean
 

Had to replace the float on my 9n. The replacement floats would rub the inside of the float bowl. On my 2n the original was also rubbing the fuel bowl but it was because the pin hole for the axle became enlarged so I replaced that one too. The new ones were rubbing the inside between the float tanks the original was rubbing the outside corners.
 
Mine did that. Found one the two floats partially collapsed. When it was down hill, it would flood out the engine.

Rubbing on the side of the carb would do it too, or if one float is full of gas.

Put the float in gasoline and see if one side sinks.
 

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