Are you talking about prop wash? I bet you are. It is caused by the swirl the prop causes, is no cure that I know of.
Kevin Pemberton
On 06/28/2012 03:54 PM, Matthew Geier wrote:
My launch gets a small 'shudder' in the rudder at certain speeds too.
The boat has probably always done this, but with the vibration of the
old engine, you would have never noticed.
On my boat the rudder/tiller assembly is quite 'loose'. I imagine at
certain prop speeds a resonance gets set up in the rudder/tiller system.
The prop is a 3 blader and it's behind a full keel.
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