From what I could find, my old engine (150 hp mariner) I believe weighs around 375 pounds.  Am I adding too much additional weight (over 100 pounds) to the boat?  Can this be compensated with trim tabs? 
 
Thanks
		 
		
		
		
		
		
		
			
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				1978 V-20 Steplift 
1988 Mercury 150HP
			 
		
		
		
		
		
	
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