I have a Prout 46
Catamaran and have just
lost a blade off my folding prop. As an interim measure I want to replace them with fixed props. I have 2
Yanmar 3jh3e (39hp) engines with
Sd40 saildrives. The folding prop is 16ins. A
Yanmar dealer has put the details in a calculator and says I need 17in props with an 11
pitch. The
pitch seems very low to me, they say I won't reach full
engine revs at the top end. Any thoughts from someone with a similar set up??