Tom,
Well as it turns out I repowered with Yanmar 3YM30. Great engines but I am definitely under propped with my 2 blade 15x9 Campbell Sailor props. My new tranny has a gear ration of 2.2 in forward so similiar to my old ZF. Were your props 2 blade or 3 blade. I am looking at the CDI perfect pitch props but have not talked with anyone whos has used them yet. Still trying to make a good prop decision.
Cheers
Tony
Just reading about your flex-o-fold props. I recently bought a Lagoon 42 TPI, the same as you. I am repowering her with new Volvo D 1 30 engines and as a result I will need new props as the gear reduction ratio is different from the Perkins M30 @ 3600 RPM and the ZF gearbox @ 2.05:1. I would like to know what engines and transmission etc you have and your prop size. What is your speed with one and two engines running.
Thanks
Tony now owner of Vakasa