We have acquired a Parker 630 with an Optimax 135 Saltwater. At the moment we have a Stainless Steel 3-blade on her and she performs well, however we want to switch to an aluminium prop as the boat will be used for training.
There is no identifying marks on the Prop with regards to diameter/pitch.
Could anyone give an idea as to what diameter/pitch prop we should go for? We are more bothered about cruising and economy rather than acceleration. We would generally run with 4 people on-board. The boat has 4 jockey seats and wide console, nothing else extra that would add weight worth while talking about.
Thanks in advance