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Model RYOBI 280R hard to start. Changed 2 fueld

Model RYOBI 280R hard to start. Changed 2 fuel lines and rebuilt carb. Will run with choke slightly open. Full open cuts out at high speeds, even when engine hot. Won't run fast for longer than 3-4 seconds at a time.

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You may need to replace the muffler,possibly it can't exhaust the fuel as fast as it is recieveing it.

Posted on Nov 18, 2009

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Posted on Jan 02, 2017

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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.


this sounds strangely like the high speed jet/pathway in the carb is clogged up with something ,

the best way to fix it is dissasmbly and cleaning of carb in solvent , but ive also had some limited sucess in past of using car fuel cleaner (says on bottle "cleans as you drive") too

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1/ a clogged fuel filter or collapsed line
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My Ryobi 77 line trimmers revs like mad when I


Hi and welcome to FiXya. I am Kelly

What your describing it the result of fuel starvation. This can be caused by:

1. Debris in the fuel line or a crack in the fuel line
2 A clogged "fuel tank" internal pick up hose screen
3. A pinched fuel line
4. A clogged needle jet seat
5. A hole in the carb diaphram
6. Debris in the fuel air mixture screw / needle passages
7. A non vented gas tank cap.

Any of the above can cause the symtom you described. For sure it is a fuel supply problem.

I tried crossing the part numbers for just a Ryobi Model 77 and was unalbe to cross it to a working model number.

I came up with 2 different carb part numbers using a 30 CC engine

1st PN: 791-182875
2nd PN: 985624001

If you can pass the exact Model Number, I can provide you with a source for the carb or parts.

Thanks for using FixYa.

Kelly


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Ryobi backpack blower will run all day with choke up but as soon as I pull the trigger it starts bogging down


Thats a lean condition. Check fuel lines and fuel filter. If the fuel ilnes are discolored or stiff or really super mushy, If the fuel filter has become detatched from the fuel line then the fuel lines need to be replaced.
If the carb can be adjusted you can try to adjust but its likely that the carb should be rebuilt with new diaghrams and gaskets.
Adjust by turning the low speed screw out ( counterclockwise) 1/2 a turn. The low speed screw is always the one closest to the motor and usually marked on the carb body with an 'L'. When you richen a motor up the idle will drop so you will probably have to turn the idle screw in 1/2 a turn. 1 and 1/2 turns out from light bottom is standard starting point ( 2 turns for poulan products). If you get more than 3 and 1/2 turns out on the low speed screw or if turning the screw has little or no effect then the carb should be rebuilt.

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My ryobi pbc-3046YE brushcutter wont run. When I start with choke it races for a few seconds then cuts out, if I get it started without choke it idles briefly then cuts out, if I try to accelerate it cuts...


Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
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Remove Carburetor
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Fuel lines!


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Ryobi 720r weedeater. Starts, stalls, won't start.


When you rebuilt the carb did you remove and replace the welch plugs. If you did not, then that is probably where your problem is. Debris, varnish and corrosion can build up under the welch plugs and the unit will not pass fuel.

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