Propeller pitch

by Jim
(Maine)

I bought a 18 ft javelin renegade fish and ski it has a 1999 Johnson 115 horse 2stroke I took it to dealer to have it prepared for winter he told me the propeller needed to be machined or replaced I told him I would do it in the spring.he sent my prop out to be serviced with out my permission.and I've yet to see it back I just gonna buy a new one but I have no idea what pitch I need as my props gone.i believe the max rpm is 6500+/-50 .i use it mostly for fishing.any one own a similar boat or have any advice I'd really appreciate it