Hi Andrew,
I would echo Adam's post, above: you should not need a puller.
There may be model variations:
Our prop anode is secured with two "allen key" - headed machine screws; remove the anode from the tip of the prop.
I then suggest you have a good look down inside the prop's hub, with a torch and/or endoscope.
Our prop is secured with a large (c24mm? /  1"?) brass nut, which is reached with a socket on an (3" ?) extension bar.
HOWEVER this nut is also secured with two "allen key" machine screws. which require  long-shafted hex keys(M5/M4? I'm sorry I forget the sizes; I keep the necessary socket and keys in a dedicated tool-kit which only comes out twice-a-year!!)
NOTE: These two screws are crucial for the prop's security: One is in the centre of the nut...  The other is off-set and secures the central screw., and MUST BE REMOVED FIRST... (,,,then the central screw,,,, then the large nut.)
The prop should them just slide aftwards off the saildrive splines.  ( Note of Caution: be prepared: it is very heavy!!)
Finally, you may  find a spacer bush and washer behind (ie fwd of!) the prop , on the splines after you have removed the prop.
The saildrive anode is simply secured with 2 x  slotted screws
I hope I have adequately described our set-up - yours may be different. but I hope this helps, and if you need more info, please ask.
Kind Regards,
Stuart