prop question newto boating

[powerwagon]

I just bought a 1986 four winns 21 foot with 190hp merc. it has a 14.5 x 17p prop on it at about 4200rpm it runs a bout 26 mph with 3 adults.Would this be the origional size prop? I know it needs a new prop should i replace it with the same one or something different? Bout is used for sking tubing and knee boarding and fishing. THANKS FOR ANY INFO

 

[hattrup1981]

Re: prop question newto boating

Have you checked here... http://boatpropellers.iboats.com/propeller-tutorials/pitch/

Lots of info on how to pick a prop.