Carburetor setting on the Homeliteuto8111 backpack blower

Goto the following website, click on parts locator and enter your model number. Form there you can get a parts breakdown for your blower. Figure "B" has the carburetor info.

Service Support

the fuel filter is blocked up check inside the feed tank for a few leafs floating about and blockages
run the unit from a can of petrol to rule out a fuel feed issue

How long has the gas been in the Blower?
If it was 10% Ethanol gas( lie most States sell at the gas pump) and it has been in the Blower for more than a few months, you probably have carburetor issues.

There may be a plugged fuel filter in the fuel tank, or perhaps you have the oil mix to rich. other problems could be that it needs a new spark plug or carburetor adjusted.
Try spraying the carb out with carb cleaner, add a little seafoam in with the gas.

Carburetor no longer available.

either carburetor needs cleaning or check the Flame Arrestor on the muffler...they clog and engine can't Rev high

I recommend contacting your local authorized service center for assistance.

You may contact the manufacturer, download manuals, check fuel/oil ratios, order parts, find your local service center, and view other resources using these links:

Contact us
User manuals
What is the correct fuel mixture for McCulloch products Chainsaw Trimmer...
McCulloch Service
McCULLOCH PARTS ACCESSORIES

I trust this information has proven beneficial.

From the pictures in the parts breakdown, this appears to be one of the newer model rotary-type carburetors. It is listed as part number 308028001. There is no mention of this machine in the Walbro carburetor application guide however. After viewing the picture and with the prefix of the carburetor known, you should be able to locate it on the Walbro website. I have the link to your machine's parts breakdown and to the Different Walbro models. Please view:

http://www.ereplacementparts.com/ryobi-ry08570-backpack-blower-parts-c-7931_15636_15640.html

http://wem.walbro.com/distributors/servicemanuals/

Hello,
My name is Dane and I am going to assist you in solving your problem.
You will need to adjust the high speed setting on your Carburetor jet. Turning the screw out just 1/2 turn or so should do the trick. It is not so hard to adjust the Carburetor, however you do need a special tool that is very hard to get your hands on, in order to adjust the jet screws. They don't make many engines with plain screw heads anymore. The newer Carburetors are factory set lean so they can pass emission standards. If you have a local dealer, they should adjust the mixture free with a recently purchased unit or for a couple of bucks otherwise. I hope I've helped. Thank you! Dane