Is the boat "Bow Hunting"?  The bow moves left & right at slow speeds? Some boats hulls do this normally. 
 
You could have a worn Gimbal housing too...  boat needs to be out of the water to diagnose that properly. 
 
 
Woodsy
		 
		
		
		
		
		
		
			
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				The only way to eliminate ignorant behavior is through education. You can't fix stupid. 
			 
		
		
		
		
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