While operating my Scags STHM-20KH mower today it stopped moving either foward or reverse.  No linkages from the foot pedal to the engine are broken.  I am looking for tips on where to start researching on what is broken and what needs to be repaired.  I will likely be calling a scags repair shop but want to educate my self on what will need to be looked at and repaired before doing so in order to make a good decision as to have it repaired or buy a new one.  This is a mower that is over 20 years old with 1250 hours on it.  Has been operating well with maint. over the years.
	
		
			
		
		
	
			
			