Ryobi 9600 backpack blower. Starts great. Set to run, continues running. Upon attempt to use throttle, engine dies. Acts like choking out but removed carb cover an choke is no closing.

chokes are an obstruction placed over the inlet to increase the vacuum in the carby and cannot be pressed
Primer bulbs are used to suck fuel through the diaphragms to expell all of the air in the system to allow starting
normally press the primer bulb until it is full of fuel
apply the choke and pull until it fires
remove the choke and at full throttle pull until it starts

check for clogged jets or the wrong jet setting, most saws are set at one and one,don't go any lower than 3/4 on the high

make sure your fuel is fresh and mix at 50:1
then remove the muffler and try to start it holding the throttle wide open... if it starts and runs fair suspect a flooded engine, plugged muffler
if not, suspect a carb adjustment issue and then a carb

Soafter you get it started, the blower wont run after choke is disengauged. If you give it gas to blow it cuts off...rite?? Have you adjusted the idle mixture screws? if so and it dont work, have you checked spark plug ? Need to know more for better diagnosis.

Clean and rebuild your carb.

They aren't designed to run with full choke on, the choke is for starting cold engines only, many times you can choke them pull the cord a few times and then turn the choke off or turn it down to start it. Then slowly reduce the choke until it runs fine on its own.

eitrher a clogged fuel filter thats in the tank, old gasoline or the fuel pump daiphragm in the carb has hardened

Remove the muffler and you should find that it will run at full speed. The muffler is clogged with carbon. You will have to replace the muffler since it is sealed. If you want the muffler cleaned you can contact southern supply company at 205-833-2525 or email them at

[email protected] and I feel sure Jason or

someone there can help you.

Yes, Your carburetor sounds like it needs cleaned. Or you may possibly need to purchase a carb. kit for your trimmer if the cleaning doesn't do any good. When cleaning the carb. use a Den Tek Brush, (teeth cleaning brush), to clean the small ports. Also, check the small screen in carb. Can get clogged easily.

Jim

try removing the muffler and scraping out any carbon build up in the exhaust mouth of the block. if that doesnt help you will probably need to replace the carb.