Small Engines (Lawn Mowers, etc.): engine, fuel needle, check pilot

Question
the engine only runs at one ideal spot(half open)when trying to lower or raise idle the governor will open and it will go up and down raving,will not run smooth.how can i fix this

Answer
HI RODNEY

SOUNDS LIKE YOU MAY HAVE A FUEL FLOW  / CARBY  PROBLEM

MAKE SURE MANIFOLD BOLTS AND CARB BOLTS ARE TIGHT ?

CHECK THAT ALL GOVERNOR SPRINGSARE IN POSITION AND ARE FREE TO MOVE , NO BINDING

CHECK FUEL FLOW FROM TANK TO CARB

CHECK THE TANK BREATHER CAP  FOR VENTING

CHECK FOR FUEL IN THE BOWL

REMOVE CARBY , DISMANTLE AND CLEAN OUT - SOAK IF YOU HAVE TO   1/2 HOUR MAX
REMOVE PLASTIC PARTS 1ST  THEN BLOW DRY AND SPRAY CRC THROUGH EVERYTHING

CHECK FUEL NEEDLE VALVE AND FLOAT- CHECK THAT IT SHUTS OFF AND OPENS  PROPERLY

CLEAN MAIN JET , CLEAN MAIN NOZZLE / EMULSION TUBE , CHECK PILOT JET IF HAS REMOVABLE ONE

CHECK EMULSION TUBE AIR BLEED- SPRAY  CRC THROUGH IT  

CHECK IDLE AIR BLEED  SPRAY CRC THROUGH IT

CHECK BOWL VENT - SPRAY CRC THROUGH IT

CHECK IDLE & PROGRESSION OUTLETS ARE CLEAR  - SPRAY CRC INTO IDLE AIR BLEEDS AND WATCH IT COME OUT  IDLE AND PROGRESSION PORTS

ONCE CLEAN AND CHECK REFIT CARB  AND RETEST  

CHEERS HOPE THIS HELPS

PAUL