Mirage 28 Prop Size

[DavidGrieves]

Hi
Looking for some info on propeller size. Boat is a Mirage 28 bilge keel with a Yanmar 2GM20 fitted. Has anybody on here got the same combination and what size prop are you using?

Thanks in advance

David

 

[Tranona]

The Yanmar gearbox offers a choice of reduction ratios. The most common is 2.2:1 (the others are 2.65 and 3.1). Assuming you have the 2.2:1 a 3 blade would be around 13*8

You can do your own calculations using this for the boat data
MIRAGE 28 (FELTHAM) - sailboatdata

and this for the propeller calculations.
vicprop.com/displacement_size_new.php

 

[Sandy]

There is a very good association, Home | Snapdragon Mirage and Invaders Association and I see they have a group on FaceBook.

My old Mirage 28 had a 10 hp Yanmar so unable to assist.