I HAVE A LAZER Z. MODEL THP19KAE483 WITH A KAWASAKI FH580V. WHEN THE MOWER IS STARTED IN MORNING IT STARTS AND RUNS NORMAL. AFTER WARM UP WHEN STARTED AND THROTTLE IS AT IDLE THE ENGINE INITIALLY SURGES AND THEN GOES BACK TO IDLE. AS THE DAY PROGRESSES WHEN YOU RESTART THE MOWER THE THROTTLE RUNS AWAY (EXTREMELY FAST). IF YOU GRAB THE THROTTLE AND MOVE IT BACK AND FORTH QUICKLY IT GOES BACK TO NORMAL. I HAVE ADJUSTED GOVERNOR AND THROTTLE PLATE AND LINKAGE AND DOUBLE CHECKED IT. AT A LOSS NOW. OTHER THAN THAT IT RUNS GREAT, THROTTLES UP NORMALLY AND GOES BACK TO IDLE NORMALLY.
