[Destroyer]

Originally Posted by Chiefsurfer

Thanks guys, I will have a closer look today. Sadly, there is no size stamped into the prop, where a size should be, there is just a number and letter stamped into the side of the prop housing.

I will post a few pics once I get her all done. Just painted the hull sides with medium blue brightsides. After about 25 hours of sanding the old tired gelcoat. I am going to do touch-up bottom paint to re-establish my water-line, and once it looks "perty" i will post pics. Also will be doing a good wash inside and out, will post pics then too.

Well if you guys say a 17 3-blade, i was thinking of going with a 15 4-blade. I know when you go from a 3 to 4, you want to drop your pitch 1-2" to keep your RPM pretty close to the same spot. I will have to go see what prop i got on her.

Sounds like a Michigan Wheel. Look at the front of the prop hub.. next to the thrust washer. Should be a couple of letters and numbers stamped into the metal right next to the splines.

You're right on the money about droppng your pitch on the 4 blade. That extra blade gives you a lot more thrust at your bottom end.. but it also takes more power for your engine to spin it, so you lose a little at your top end. In fact, the fastest prop for top end is a 2 blade, but you run into vibration problems with them. For our kind of recreational boating 3 blades is about right for most people.