Yamaha hydra drive prop

[wolfie]

Hi, looking for a 17 pitch hydra drive prop, OR any advice on what others are using, my problem is not achieving full rpm with the 19 pitch I have, so need to come down to get the 450 revs I need

Regards

Wolfie

[wolfie]

Brine running a hydra drive ?

[Turbodiesel]

https://www.ebay.co.uk/itm/154168718377