Hello to everyone..
I writing from Croatia, the most beautiful place for nautic...

I bought the coronet 26 family sport from 1979... How can I say: it was love on the first sight.... and its my first boat..
It had installed two volvo penta aq145a engines and volvo 280 z-legs...
so, i can't finde anywhere the original size of propelers... it has two different sizes installed and I'm not sure in the legit of size...
Any help...

15*17 should be sufficient. Ought to give you a max speed right around 30.

Bjørn

Thank You for reply and advice..
You just confirmed my little research...
I will put volvo penta 814-612 & 814-616 propeller... It's 15x17P and have HS (high speed) declaration...