B&S 18.5hp issues resolved??

I know B&S had issues with these engines blowing gaskets, bending rods,smoking and so on. From all the research I have donr it seems like these issues were around 2010 to 2012 ish.... but I can't find real data on what years those engines were. People just talked about them in that time frame. My question. Is. Have they redesigned these engines so these issues no longer happen. I ask because the mower I'm looking to get has this engine in it the 18.5hp single cyl
OHV

Thank you very much

B&S 18.5hp issues resolved??