I replaced the fuel filter on my 20 plus year old mower and now it does not run as well.  It seems to be sputtering a little at lower idle and i need to keep the choke pulled out a little.  It ran great before i changed the fuel filter.  I was doing some maintenance before giving the mower to my son.  
Any suggestions. I did run the mower out of gas before i changed the filter.
	
		
			
		
		
	
			
			Any suggestions. I did run the mower out of gas before i changed the filter.