That is a tension spring for the throttle. I maintaines the throttle lever in position. This would not likely cause surging, just either too hard to move throttle or lever would not stay in position you put it. I would first look at carburetor. Mainly the load/high speed circuit. If you reach in and physically hold the throttle in one position does it start to falter? if it does look into rebuild of carb and check fuel flow from tank. If it does not run out of power when holding it in position look into setting governer. Please take the time to do a followup as to what you find.....
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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