If the plugs are dry you're not getting fuel, plain and simple.
There's no magic involved. Either the gas isn't getting to the engine because there's no suction, or the gas isn't getting to the engine because something is plugged up in the carburetor.
I took my Super H carb apart half a dozen times before I got it right. There are nooks and crannies in there that are not obvious. On mine the float was apparently jamming against the side of the bowl, but there was no evidence.
One thing to check: Did you open the high speed and low speed needles on the carb after you reinstalled them? I think the low speed is 1-1/2 turns and the high speed is 4-5 turns to start with. If those are tightened down, no gas will flow.
Also use the choke when cranking, but be careful you could flood the engine.
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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