surging Kholer engine

[smallenginerepairs]

I have a kt735 spec 0005g1 that is surging bad. I've set the valve clearance, new plugs, new oem (walbro) carb. I checked compression and one cylinder has 125 lbs and the other has 97 lbs of compression. does this indicate a blown head gasget? can there be any other issues?

 

[Bertrrr]

Does it surge under load when cutting Grass or just running at idle