Strange print problem

As a new user I have been happily been printing for a couple weeks until I tried some fresh Sunlu PLA silver and had this result three times. I set the filament type to
generic PLA. I find it strange that the arms, legs and most of the body printed fine while the threads did not. I also used the silver on another print and it went great.

spark plug AMS(2).3mf (2.1 MB)
Thanks in advance!

To me it looks like over hangs without enough support or cooling.

Isn’t sunlu a rebranded esun? (or vice versa) esun is pla+ so isn’t sunlu as well?

Just checking as that will make a huge difference is you slice pla+ as gen pla!

edit: sorry wonky pasting - yes looks like cooling issue!

Not sure about the rebrand but it wouldn’t surprise me if there aren’t only 2 or 3 actual manufacturers. I am new at this and learning and loving it.
Anyway after several failed trials I finally narrowed it down and sparse manual tree supports gave me success

Thanks for the input!