Height Location of Prop Relative to Bottom Of Transom

[CH1968]

Hi Team.

I have the 25" shaft on my 110HP Johnson on a 25" transom - all good.

Where (vertical difference in height) should the prop shaft sit in relation to bottom of transom?

Optimal location to eliminate caviation, etc.

Cam

 

[Esox]

Re: Height Location of Prop Relative to Bottom Of Transom

Typically the anti ventilation plate should be even with the bottom of the boat.

 

[CH1968]

Re: Height Location of Prop Relative to Bottom Of Transom

What is the anti-ventialtion plate?

 

[Silvertip]

Re: Height Location of Prop Relative to Bottom Of Transom

The AV plate is the flat plate directly above the prop. Flush is a starting point. Best performance is generally achieved at one or two inches above the bottom of the boat but the exact location depends on the prop, hull, etc.