Sputtering Noise

[abeja_reina_1989]

My friend's mower is making this sputtering noise, I don't know how else to describe it. What do you think it could be? The engine? Or something less serious? It's not completely consistent, so it's weird to me.

 

[KennyV]

most sputtering (running issues) is due to fuel or carburetor problems... what type engine is on it?? :smile:KennyV