My Toro Time-Cutter Zero-Turn Lawnmower Surges whenever there is no load. It is fine as long as the blade is engaged but when dis-engaged or even when going down a hill with the bade engaged the engine surges. I removed the carb, cleaned it and sprayed cleaner through all the ports, everything looked good. Put everything back together. No change. I found a speed control kit on line but other than the spring breaking I don't know what could go wrong with it. And it doesn't seem likely that the spring would cause the problem. Any ideas?
#2
PTmowerMech
Surging is usually the engine not getting enough fuel. You probably have a clogged jet that didn't get cleaned. Post the engine model number.
More specifically an idle circuit jet or passage obstruction
#4
StarTech
It is even possible the governor's flyweights have a little play as on some Kohler Courage engines I need to use about .010-.030 feeler gauge between the throttle stop and throttle vane lever when setting the static governor adjustment to eliminate the surging..
