My understanding is that the space between the prop and the rudder should be 15% of the props diameter. Almost 2" for a 13" prop.
Dan S/V Marian Claire
Edit: If I am doing my math correctly you would need to drop down to a 10" prop to comply with this space suggestion.
Last edited by Marian Claire; 10-29-2018 at 09:45 AM.
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