Stilh leaf blower and it surges

Have you tried flushing and cleaning the fuel system from the tank all the way to the carburetor? If there is a filter in the fuel system try cleaning or replacing it.

check the motor and clean all dust....tight the all loosen parts

Russ please explain "it runs at over 1/2 throttle".

Hi
Stilh recommend 0.020 inch (20 thou), however I have found that 0.025 (25 thou) or 0.6 mm provides a better start and run arrangement.

Regards
Jacko from down under

In California the new blowers have sealed mixture adjustments and you need the have your carb. mixture adjusted be a qualified shop. If your carb. HAS mixture adj., turn the high speed mixture so it runs best at high speed, then turn another 1/8 turn counter clockwise to be a little rich. Then at idle adj. the other screw till it idles best.

Look for a replacement tank online! They are available and resonaably priced too. you will get new fuel lines and a new gas cap too! Bonus

This machine has a metal throttle rod from the trigger to the carb, you need to look at the side of the carb where the rod connects to the carb, with your finger ( with the engine stopped ) work the carb throttle spindle manually to see if it is moving freely and it springs back to the small throttle idle screw easily, if it does unscrew the idle screw with a cross head screw driver until the machine idles ok, if not you need to take the l/h side cover off to investigate what has happened .

the exhaust side of the engine is clogged with carbon. clean the carbon from the port and spark arrestor screen and it should go away. to preveent this again run your unit at full throttle all the time or at idle never inbetween

Hi
This is either a clogged muffler or carb. Take the off and see if it will rev. If not you need to clean carb and install a carb repair kit. Do not run long with muffler off.
Sam

the carb has a screen in it it needs to be cleaned out the fuel gets crystalized in the carb when it sits for a while. and if the carb has a high and low on the carb meaning 2 screws on the side of the carb .one is for air and the other is for fuel try this first start it up and give it full throttle and turn the high adjustment till it does something screw it in slowley and or out till it is at full rpm sometimes the adjustment screws do vibrate there way out of adjustment .if it dont work then take the carb apart to clean out the screen