225 engine spraying oil

The valve cover beather is supposed to send the excess crankcase oil vapors into the air cleaner at larger throttle openings; under those circumstances, there is very little vacuum in the manifold and the vapors go into the air cleaner to be eventually burned. If the PCV system is not working, then the vapors will go into the air cleaner much more than they should.

In addition to the above suggestions, it is very common for the PCV system to get plugged up where the PVC hose goes into the carb base. Makes sure you check there too.