I see Rusty offers a 9 blade plastic radiator fan for the 123s, compared to the stock 6 blade aluminum one. Has anyone tried the 9 blade one to see if it offers any noticeable cooling improvement? Is itnoisier?
It's quieter. The SDL was forcibly upgraded when it got its new clutch.(As the old metal-fan rated clutch was NLA.) It's supposed to cool better,
too. It has asymmetrical blade spacing so that it doesn't howl as much. -- Jim