Prop help michigan prop 031051

[Lake time]

I have a michigan prop 031051 it does not have diameter and pitch stamp anywhere I'm trying to find out the dia and pitch of the prop to get a new one it's aluminum and it's on a carver montango 2657 with a 1985 5.7 merc max remember 4800 with ano sei out drive 1.47 gear when on plane 13 people aboard 100 gal of gas top speed is 4500 at 37 to 40 MPh I like where the boat rides I don't want to change it would like an aluminum and eventually to ss help what size is the current prop

 

[steelespike]

Michigan Match 16 X 16. Would be interesting to see the lightly loaded wot rpm and gps speed.

 

[Lake time]

Ok thanks and with no gear and half tank GPS shows 44 at 4800 but I back it off to 4500

 

[steelespike]

Calculates to a good 11% slip.

 

[Lake time]

Is that good or bad

 

[steelespike]

Is that good or bad

Thats good, when I have to guess slip I use 12% ,11% is better.

 

[Lake time]

Thanks I definitely want another 16x16