My dad and I just baught a 20' 1999 Procraft awsome boat garge kept.We are wanting to add a hydraulic jack plate and a new prop this ones chipped up a little.I have found a cuple differant jack-plates I'm thinking of but I'm really puzzled when it comes to props. There are so many options out there We fish the river mostly,nothing heavy current and some lakes. Anyone with any tips  I would greatly appriciate them Thanks and good fishin' to everyone. ;D

You've given us very little information to go by. There are guys over there who own or owned your particular model boat and setup and can steer you in the right direction.

Mercury Marine has a nice prop page. Sorry but this site wouldn't let paste it in.

http://sites.mercurymarine.com/portal/page?_pageid=126,48417&_dad=portal&_schema=PORTAL

I just tried out that Merc prop selector.

It came up with a 27p tempest for my boat.

;D

Well, if it worked right it would be useful.  

You will probably use a bunch before you find "the right" one.

Thanks alot for the help guys ! good fishin

Propellor selection is "Black Magic".  Each and every boat performs a little bit different with each prop.  At a minimum you need a prop that will get the boat on plane but not exceed the recommended maximum RPM.   The rest of the selection revolves around the trade off of getting on plane vs top speed.  Many times a guy will get a prop and then complain that the boat's top speed isn't what he wanted.  Then he will change to a higher pitch prop and find that he doesn't like how long it takes to get on plane.  Boat stores and prop dealers will tell you that there is never an exact answer to the question.  You need a Tachometer and trial and error.