The right prop for the job?

[vette53]

Late fall I installed a 350 and an OMC Cobra outdrive in a gutted 1988 Donzi Regazza 25'. I had a hand full of different prop's that would fit the OMC. By the time I got the engine rewired and running I ran out of warm weather. The prop's I used to break it in were too small and I'm looking for suggestions. I was thinking about a 14-1/4 x 25 ?? I looked at the Ballistic SS but I saw some bad write-ups. Need some help.

[vette53]

During the breakin I had the smaller 21/17 geared Cobra outdrive. I was having problems with total timing at the time and never got above 4000 RPM. The speedometer was acting screwy but most the time was between 32-35mph. I hadn't put in my GPS yet, wish I would have. The prop at the time was a aluminum 14-1/2 x 21. Within a week or so I am going to install a set of 21/16 gears in the outdrive.