corresponding propeller

[squaw999]

What is corresponding size of 2 blades propeller for Yanmar saildrive SD 20, Yanmar 3GM30?

[alamoana]

There is no such propeller. Depending on the weight of the boat and hull shape you can go fast in a very light and narrow boat (with a large pitch propeller) or you can go slow in a very heavy boat with a small pitch propeller. Good luck

[GordMay]

You might want to read the“PROPELLER HANDBOOK” ~ by Dave Gerr

On the surface, choosing the correct propeller for a particular boat seems simple. But one factor affects another, which then affects another factor, leading many boaters to believe that propeller selection depends more on black magic than logic.

All the questions are answered in this complete reference, the first of its kind. This clear, easy-to-use handbook for all small boats is written not for Ph.D.s seeking the latest wrinkle in high-tech propeller design, but as a practical aid for the average mechanic, engineer, boatbuilder, fleet operator, serious yachtsman, or naval architect.

Here ➥ https://www.gerrmarine.com/PROPELLER_HANDBOOK.html

Or (?) ➥ https://doku.pub/documents/propeller...k-p6lk7kr7n804

[squaw999]

GordMay tnx