Rik
Thanks for answering, I understand your the resident inhouse expert with these systems

Yes its alum Bronze 1720 1:1, it has the cylinders for lowering the anerson for trim, as well as the cylinder for turning

I measure where the stainless shaft comes out of the bronze casting where the seal is to end of the of shaft is 195mm (7.67")
The prop shaft is 1.25" dia (19 spline), was there any shafts ith 1.5" dia x 19 spline built?

I was looking at a rolla prop cant remember if it was 5-6 blades, 17" x 24" pitch but 19 spline x 1.5" dia, (the hub may have been 4.75") supposedly from Mercury or Anerson drive,

Just wondering whether I could get it to work with an adapter, or am I better looking for a 3 blade older prop

any help would be apprechiated

So measuring from the beginning of the large end of the taper to the end of the splines you get? This is either 4" or 6".. In order to use a current "SpeedMaster" propeller, you need 6" of shaft area after the start of the taper.

Can't answer your questions on propellers as I know nothing of your boat and engine power......

Rik
I measure the shaft as attached

the boat is 21' mon hull, with twin turbo MPFI 454" I suppose 550 hp +

do you think about prop size?
http://picasaweb.google.com/11375187...20844375068130

I cant seem to load picture
however the link is here

http://picasaweb.google.com/11375187...20844375068130

If it helps this discussion at all, I traded a single RH 16.75x29.5" merc 4-blade cleaver that fit a 19-spline SSMIII in to Scott at Speed N Custom Marine last year. If this is the right spline, the prop could maybe be rounded off to do what you want. I don't know if he still has it. It was a heavy-build prop, probably an 800 hp model.

Are you running a 1:1 on your transmission or ?

Setup info: ?

Did you run this boat before? What propeller and how did it run?

rolla propeller
 

i have a 17.75 x 20 rolla 4 blade cleaver with 19 spline shaft. if you are interested pm me.

Rik
no never run the boat or drive, picked up the #1720 and decided to fit it, with a motor I had here
It has been suggested I should run a ZF or Velvet box/Huber around 1.5 ratio.
THere was a steel prop that came with the drive, 14 " dia x 26 " ?(i need to measure the pitch), that had originally came off V drive and hada spline pinned into hub, I think it may have been carselle prop, I dont think it was ever run with it, as the guy I picked up the drive from a guy who had it under his bench for 15 years and never used it.

Boat size, make and such?