I think when i turned in my husqvarna LGT 2654 to the shop (3 years ago) they cleaned

My carb and maybe lost a spring but I cannot see any exploded view of the governor on the engine - there is one spring from throttle bracket to the governor and I thought there should always be 2 springs with different names (that people name wrong) but they have these new fangled throttle and chokes combined yadda, yadda so I am not sure if it is missing one and cannot find the breakdown of the governor bracket to confirm this.
 
I also have the question nobody asks when the mower runs well - I cleaned out the tank and lines and rebuilt the carb but the filter looks like it is only 20% at the bottom of the filter but flowing.  This maybe the case all the time but one never looks until there is a problem.  It is nowhere near 1/2 full but I have never really looked and it runs similar to before rebuilding and cleaning all the tank, lines and carb - just didn't want to shotgun troubleshoot the fuel pump which I guess could have been replaced now anyway with 1200 hours on it,
 
It was surging after I got it back from mower shop who claimed husqvarna's must surge?  I split the case because the gasket was sucked into the sump floor and was leaking/smoking an when I put it back together I wasn't cure how to adjust the choke and the governor. 
 
It almost rust the same as before I rebuilt the carb and cleaned the lines - so I was thinking maybe the spring was gone when they disassembled my carb or maybe the fuel pump could cause the surging.
 
Today I got it back together, adjusted the governor and the choke and it ran better than before but was surging some - when I choke it I can get it to run smoother - like its lean and surges.  Yes I put the largest jet (116) on the right and (113) on the left side of the white stanchion.  The passages were cleaned and new gaskets - the jets in the station somebody said was 1 x 2.5 and
 
I could barely get the O-rings into the seats in the plastic white stanchion - they looked a little large and I did lightly coat with petroleum jelly so they didn't rip or smash.  
 
The carb looked good when I dissembled the carb there was nothing to bad at all and I just made sure every orifices' was open  and cleaned.
 
I readjusted the governor a second time and it seemed like it surged a little more than the dry adjustment before I started it.   
I looked on youtube and it says there is supposed to be a idle governed spring - my LGT 2654 only has one governor spring on it?  I see an arm with a hole but no breakdown on the spring and its part number or where it goes?
 
 
Please, helppppppppppppppppppppp