Does the original Volvo prop shaft streamlined cone nut really do very much to prevent turbulence and increase performance ?
Has anyone tried running, with & without the cone nut using a standard SS nylock prop retaining nut ?
With a modern Solas SS prop with a very large outside hub diameter I wonder if the cone retaining nut really does very much to stop turbulence ?
My old Volvo AQ 270 has a short shaft without a center drilled hole for a retaining capscrew.
I suppose I can always drill & tap the shaft center if necessary ?
BUT~
I was thinking of just running with a SS nylock nut & possibly an extra thin jam-nut if the cone nut is really not necessary ?
Is the prop shaft's thread ~~~20 MM ?