08-31-2006, 02:47 AM 
		
	
	
		It is on a volvo penta outdrive and they don't have shear pins. It just has a cone chaped piece that screws in to hold on the propeller and a bolt that screws in to the back of that to hold it in place and I think the bold vibrated loose and then the cone thing just unscrewed itself, 
jed
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jed
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