Small Engines (Lawn Mowers, etc.): RPM surge, crankcase, tention

Question
I have a Honda 3813 and when it gets warmed up the engine rpm's will all of a sudden shoot up to about 5000 rpm's. Otherwise the mower runs great. I removed the governor and it looks as though it has been replaced and I could see no problem with it. The governor was adjusted according to the manual. I am checking spring tention but it looks like a original spring. (I have 5 of these mowers and they all have the same spring). Any suggestions?

Answer
Hello Scott:

>>If I Understand your Question and Comments; you have already Opened the Crankcase and Checked the Internal Governor and it is Good.
>>Send me the Model Numbers Off the Unit, Please. With these I can Locate the Proper Manual and Better Assist you.
>>Thanks

Respectfully

John

>>PS: I am Allowed to Answer 5 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.

Respectfully

John