Craftsman blower stalls when choke is disengaged

How long since the primer bulb was changed?
How long since the spark plug was checked?
Gas left sitting in the carb since last September?

Gas-Powered Leaf Blower Starting Then Stalling? 5 Likely ...

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Oct 12, 2022 - Clogged spark arrestor - Over time, the arrestor's metal mesh can become clogged with soot or other debris, which can cause the engine to stall.

Missing: Mcculloch ‎ GB320

Maintenance - McCulloch GB 320 Operator's Manual

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McCulloch GB 320 Manual Online: Maintenance. Disconnect the spark STARTING A WARM ENGINE 1. Move the choke lever to the HALF CHOKE position. 2.

Sounds like the carb is getting "vanished" from using ethanol gas. You need to use only non-ethanol gas in small engines. Use some sea-foam in it to help clean it out. Or you may need a new carb. They are really not expensive.

If its started and idling,why are trying to choke it??????
Don't do that just start blowing dude. Good Luck......

Check age of gas. Cannot be more than 30 days old. Make sure to use fresh gas w/synthetic 2-cycle oil @ 40:1 ratio (1 gal.) Gas to 3.2 oz. Oil). Do not use old or stale oil/gas mixture. Always use the proper oil/gas mix. If you do not, your engine will suffer rapid, permanent damage. May need to clean or replace carburetor.

Try running some fuel system cleaner through it. A good choice is Chem Tools Berryman B-12. There are some hardworking solvents in the product that could help you overcome a dirty carburetor. Initially use a good, strong dose. Maybe double what they recommend . (1 oz/gallon). If this doesn't work, the carb will probably need to be removed and inspected and cleaned.

Trimmer Starts but stall out as soon as throttle is used and choke turns off. if I hold the throttle and pull the choke it runs but will stall as soon as choke is let go.

Hello,

Most Probably the problem lies in the adjustment of the carburettor. There are two needles in the carb one for lowend adjustment and one for high end adjustment. Your lowend adjustment seems fine. The highend needle needs to be adjusted. Following are some very detailed procedures for adjusting these types of carbs

http://tech.flygsw.org/walbro_tuneup.htm

http://www.drystacked.com/Walbro%20Carburetor%20Theory%20ebook1.pdf

If your machine has a carb other than a "Walbro" dont worry the procedures are same. I am sure if your engine has not completed its life span this will solve your problem.

Your carb is leaning out, causing the thing to die. Try adjusting the mixture screw (out) to richen the mixture. If there is a cap, you can pull it off to go richer. If that doesn't work, either the filter/pickup is plugged, the fuel line is kinked/smashed, or the carb needs to come apart to be cleaned.

Hey Karl,

To me this sounds like its getting too much fuel after it has been warmed up so either there is too much gas flow to the unit or there is not enough. check your primer bulb once this happens if there is a full bulb when it shuts down chances are its getting too much gas, if its empty then its not getting enough and your fuel filter could be starting to plug up or is not in the tank properly.