na pradet nuo oro filtro reiktu...o paskui

Whoa! Your Mower is Smoking:

This might look a little scary, but it's usually not serious. Your lawn 
mower's engine can smoke if your oil chamber is too full, or if oil leaked 
into the exhaust muffler when you tilted your mower to the side. It's simply 
burning off while the engine is hot. But if you're seeing lighter colored 
smoke, plus have trouble keeping your mower running, it's time for a serious 
look by a professional.