On Oct 15, 6:57 am, Frogwatch wrote:
...Now, one of the advantages of a 2 blade prop is that you can align it
with the keel for lower drag....

Correct me if I am wrong but I believe the S2 8.5 is a fin keel, spade
rudder set-up with the prop just ahead of the rudder. In this case
there will seldom be any drag reduction advantage to aligning the
blades of the prop with the keel.

-- Tom.