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			#1  
			
			
			
			
			
		 
		
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			How do you know when it's time to replace the zinc's?
		 
		
		
		
		
		
		
			
				__________________ 
		
		
		
		
		
	
	1987 V20/Suzuki DF140 4 Stroke  | 
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			#2  
			
			
			
			
			
		 
		
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			When the fastener holding it in place rattles ;) ...
		 
		
		
		
		
		
		
			
				__________________ 
		
		
		
		
		
	
	'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha  | 
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			#3  
			
			
			
			
			
		 
		
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			I think the rule of thumb is when they're about 50% of their original mass.
		 
		
		
		
		
		
		
		
		
	
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			#4  
			
			
			
			
			
		 
		
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			So you are saying its about the same rule of thumb as viagra?  
		
		
		
		
		
		
			:o 
				__________________ 
		
		
		
		
		
	
	1994 Wellcraft V21  | 
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