I have been dealing with this forever. I need expert advice please. I have a Kohler K241 that I have been bringing back into service. Runs strong but a little smoke on start up. Anyway, I have had a **** of a time getting it to climb RPM's. It has been stopping around 2900. After rebuilding the carb, I mean EVERYTHING in the carb is new, I have played with adjustments forever with no change. I finally began moving the spring position and can get higher RPM's that way. In fact, tonight I got it to 3650, PERFECT! Only problem is it brought the low idle RPM's up as well. From 1500 to around 2500.. What causes this narrow range of RPM's and how do I fix this? I like the top end but I really dont want it to idle at 24-2500 RPM's.. The governor is adjusted. Please help... -Nick