smoking and blowing oil

my son the fireman has a deere z225 i believe is the model. It has an 18.5 B&S engine.It blows oil out the oil filler. I went to this forum and found out this engine has a problem with the head gasket. So I went to the local hardware store and got one that had the number 33 stamped on it. The one I took off had a 31 stamped on it.I followed a guy on youtube on the proper torque pattern and torqued the head to 220 in/lbs. I did not put any sealant like permatex gasket maker on the gasket. Put everything back together,fired it up and got the same results,smoke and crankcase pressure. So I put 130 psi on it and got no pressure from filler except for a slit second as I turned the engine by hand. It was never continuous.I took compression reading and it was 150 psi. The only thing I see different is the gasket width is the surface area is a little wider on the old one. The engine has 600 hrs. on it and runs great and he changes the oil often. Any ideas?

 

It's normal... if you remove the oil cap with the engine running, it is going to blow oil out like crazy.