Suitable size propeller

[Peter069]

Hi, I´m new on here and new in Rib world.
I ‘we got my hands on an Avon Sea rider 5.4. There was no motor on it, but I found a Mercury 115hp 2-stroke -97 for a good price.
What would be a suitable size propeller, any suggestions?
//Peter

[Starovich]

I think the max recommended on a 5.4sr is 90, tho im sure some put more on it.
See here