I have a 4LH-DTE yanmar diesel engine why would oil squirt from the breather at high rpm?

Oil may squirt from the breather of your Yanmar 4LH-DTE diesel engine at high RPM due to excessive crankcase pressure. This can be caused by worn piston rings, a clogged breather system, or insufficient oil viscosity, leading to blow-by and forcing oil out of the breather. It's essential to check for these issues, as they can indicate underlying engine problems that need addressing to prevent further damage. Regular maintenance and monitoring can help prevent this situation.