ORIGINAL: rebuilder
You could run an octura 447

and the ''monster'' would barely get warm im guessin'.........................lets see, hmmmm, 27'' vee, 5+/- h.p. brushless, 50,000rpms, 447 prop = 60-65 mph on glass?????? would you dare run a 450?????
P.S. - you beat me to this project, cuz i was gonna pull mine out of my 3905 to try it, but i was gonna go with a 72'' vee i saw on e-bay, i'm very interested to see and hear about this..................i'm sorta livin' it thru you.
you will not see 5hp out of this setup! that was on 6s and over geared..
motor is only rated 1500watts cont and 2500watts burts...
the motor will only draw the amps it needs to run, it will not always be pulling max amps (max watts- max hp)..
most do not understand that the motor will only pull the amps of what it needs to move