Hey guys I need some help with a Briggs & Stratton 16.5 OHV mower .
The problem is when I star the mower oil comes up from the breather and sprays my oil filter. And then that oil gos down my carb then the mower starts smoking like mad.The smoke comes mostly from the muffler.
Do any of you know what might be the problem causing this to happen?

Thanks in advance Jack.

Get the full model of the briggs engine. Most likely the oil breather needs to be replaced.