I have a 12.5/42 cut mtd riding mower, when I shut my engine down I have a major oil leak on the left side by my carb.
How can I tell if my breather assembly is going bad.
At the present I am changing my Filter and my plug. Do I need to replace my breather.
My mower ran smooth, do not smoke easy to start, after I stop I observe the oil running down.

Could just be the gasket around the breather, but the assembly is not very expensive, I'd probably just replace the whole thing if I had very many hours on the engine.

Thank You I Replace The Whole Unit (breather ) From Small Engine For $8.91.
No Leak.