Small Engines (Lawn Mowers, etc.): craftsman lawn tractor,mower repair

Question
I have a craftsman 1800 yard tractor mower,i just changed starters on it,fired it up,now it smokes heavey,it seems to be sucking oil out of crank case.how do I fix this problem.thx

Answer
What engine is on the mower?  Does the oil smell like gasoline and is the oil thin and runny?

Let me know the engine brand along with the engine model, type, and code/serial number.  You know you have the correct engine information when you Google the model and type numbers...Google should find the parts lists diagram for your engine.

Eric