could also be more or less my not knowing that engine, but when it starts getting close to tune it is getting way to hot for my liking.Yea ,definitely check those things ,an if he did have the head off at one time ,make sure that the head shims or gaskets
aren't scared or boogered up ,I would seal the engine ,if it is a pull start ,make sure it doesn't leak out at the starter out-
put shaft ,or backplate!
and it seems to have an inconsistent idle. sometimes it idles perfect, others it tries dying.
need to have him make sure the tank is sealed too, sometimes it seems more pronounced while under half tank, other times not though.