Correct Prop for 1989 5L Sunbird Corsica 19.5ft

by mark bullen
(Colchester, Essex, UK)

HI does anyone know what the correct prop and pitch I should have on my 1989 Sunbird Corsica 19.5ft. It has a OMC 5L inboard. Currently I have a 4 bladed prop on it but haven't a clue if it's the correct one !
Thanks