I have a 2014 Bennington 21SLX with a Mercury 150 4-stroke. I noticed when cruising that an "H" or "R" was displayed to the left of the engine hours on the tachometer. I can find no documentation on the tach and it is not obvious who manufactured the tach.  Is it some kind of alarm code?
				
			 
					
				 
 
		 
 
		