International Cub DOA...help needed..

Check spark first.. if spark is bad/none.. run a jumper wire fromthe battery bypassing ignition switch to coil,, then check again.. still none? take a piece of 800 or 1000 finishing sand paper and pull it thru the closed points once on eace side of the contact ( this is not great for the points.. at best you replace them or use a real ignition hone.. but for checking.. this will get you going.. ).. if this helps.. your points are needing replacing.

If you do have spark.. look at the carb.. black smoke means rich.. that is either a plugged air intake.. a flooding carb.. or weak spark..

Soundguy

If it seems like it doesn't have fire, then check for fire: Pull a spark plug, lay it against the block, and crank the engine over. See a spark? You have fire, so that's not the problem. No spark? Then your problem is somewhere in the ignition.

Air, fuel, and fire, all at the right time. That's how a gasoline engine works. If your engine don't run, then it's got to be one of those, so start checking. Air is generally not the problem unless your engine is badly worn to the point where it can't suck enough air, or the cam is broken and not letting air in. Normally problems like this are fuel or fire.