Hunter 29.5 Prop Recommendations?

[Chief Engineer]

Yanmar 2GM20F (The boat currently has a three blade prop which I think is too much for an 18 HP engine)

I thought I saw a prop calculator link on CF but when I search "propeller+calculator" all I get is a bunch of oddball threads that say nothing about prop calculator.

[Boracay]

Propcalc
Bomon
rbbi
Boatramp

I used them to check my propeller specs on Boracay.
They look to be in the the right "ball park" but I found they indicated too much pitch for a big heavy boat.

User beware.