Probably an adjustment. First off, I assume the carburetor is functioning OK and properly adjusted (idle is good and engine seems to develop good power at high speed). If so, the next thing to check is the adjustment of the linkage between the governor and the carburetor. The linkage has a threaded end at the front. No magic to this, just do it by the book. If this doesn't cure it, you need to adjust the bumper spring on the governor. There should be an acorn nut on the bottom of the governor housing. Remove it to expose a threaded stud with a jam nut. The bumper spring is on the end of the stud. Loosen the lock nut and turn the stud in a little and test the results. Repeat if needed. Only turn the stud in enough to eliminate the surging. Tighten the jam nut and put the acorn nut back on.
If you have not had the governor apart, you should remove the stud completely and check/clean the spring (the spring will come out with it). Sometimes the springs are gummed up, rusty or even broken.
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I�m handing him tools and he says, "give me that..." and I�ve already got it in his hand or "hand me that....."and I�ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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