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Ryobi RY08420A Backpack Blower

Ryobi RY08420A Backpack Blower Parts

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Ryobi RY08420A Backpack Blower

Ryobi RY08420A Backpack Blower Parts

Page A
Page B
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Page A
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 Fig #
1
Frame
 $16.58
Part Number: 524584001
In Stock, 7 Available
Ships within 1 business day

2
Fuel Tank Assembly
 $15.79
Part Number: 310752015
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Ships in 5 - 11 business days

3
Fuel Cap Assembly
 $4.55
Part Number: 310816005
In Stock, 7 Available
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4
Cable Clamp
 $1.99
Part Number: 678561001
In Stock, 1 Available
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5
Wrench L-25
 $1.31
Part Number: 631055012
Ships In 5 - 11 Business Days
Ships in 5 - 11 business days

6
Screw (10-14 x 16 mm)
 $1.99
Part Number: 660614001
In Stock, 11 Available
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A-7
Spring
 $1.99
Part Number: 679950001
In Stock, 9 Available
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8
Screw (10-14 x 16 mm)
 $1.99
Part Number: 660626006
In Stock, 7 Available
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9
Strap
 $32.06
Part Number: 901588003
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10
Harness Snap Fastener
 $1.99
Part Number: 525644002
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Ships in 5 - 11 business days

11
Ignition Module Assembly
 $19.03
Part Number: 291424001
In Stock, 19 Available
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12
Throttle Cable
 $12.87
Part Number: 290298003
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13
Clamp Set
 $2.31
Part Number: 580465001
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14
Tube
 $9.98
Part Number: 580693004
In Stock, 16 Available
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15
Clamp Set
 $2.31
Part Number: 580465001
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16
Bushing
 $2.99
Part Number: 518481003
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17
Left Hand Handle
 $3.90
Part Number: 518271004
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18
Blow Mould, Upper Tube, Black
 $5.03
Part Number: 580692003
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19
Cruise Lever
 $1.99
Part Number: 518160007
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20
Washer
 $1.99
Part Number: 678125001
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21
Screw (#8-14 X 50 mm)
 $1.99
Part Number: 660666001
In Stock, 4 Available
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22
Trigger
 $1.99
Part Number: 518255005
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23
Momentary Contact Switch
 $3.99
Part Number: 760338004
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24
Trigger Lock
 $3.99
Part Number: 518150001
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25
Screw-Thread Form. (#10 X 3/4
 $1.99
Part Number: 82563
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26
Screw (M4 X 1.75 X 16 Pan Hd.)
 $2.99
Part Number: 660734001
In Stock, 2 Available
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27
Knob
 $1.99
Part Number: 518273002
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28
Blower Tube
 $7.97
Part Number: 306947001
In Stock, 23 Available
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29
Blower Tube
 $7.97
Part Number: 306947001
In Stock, 23 Available
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30
Model Label
 $1.33
Part Number: 940991051
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Ships in 5 - 11 business days

31
Choke Label
 $1.99
Part Number: 941738001
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Ships in 5 - 11 business days

32
Start Instructions Label
 $1.99
Part Number: 941739001
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Ships in 5 - 11 business days

33
Logo Label
 $1.19
Part Number: 941740001
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34
Warning Label
 $1.99
Part Number: 941727003
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35
Combustion Warning Label
 $1.99
Part Number: 941727002
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36
Right Hand Handle
 $2.84
Part Number: 518272004
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Ships in 5 - 11 business days

Page B
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 Fig #
1
Screw 10-24 X 3/4 In
 $1.99
Part Number: 660629005
In Stock, 5 Available
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2
Engine Cover and Starter Assembly
 $39.02
Part Number: 308563013
In Stock, 17 Available
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3
Motor Cover
 $21.95
Part Number: 524587002
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Ships in 5 - 11 business days

4
Starter Grip
 $1.99
Part Number: 511731004
In Stock, 9 Available
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5
Eyelet
 $1.19
Part Number: 638088002
In Stock, 5 Available
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6
Spring and Container
 $4.28
Part Number: 638033001
In Stock, 25+ Available
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7
Starter Rope
 $3.99
Part Number: 900849002
In Stock, 12 Available
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8
Starter Pulley
 $3.99
Part Number: 521519001
In Stock, 12 Available
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9
Starter Cap
 $1.99
Part Number: 638980001
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10
Power Head
 $90.06
Part Number: 311017001
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Ships in 5 - 11 business days

11
Fan Disk
 $7.56
Part Number: 679052003
In Stock, 2 Available
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12
Lock Nut
 
No Longer Available [ More Info ]
Part Number: 04277
Discontinued
Not Available


13
Bolt (M5 x 25.4 mm)
 $1.99
Part Number: 660613001
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14
Screw (M6 x 14 mm)
 
No Longer Available [ More Info ]
Part Number: 661431003
Discontinued
Not Available


15
Spring Washer (ID64 x 16t)
 
No Longer Available [ More Info ]
Part Number: 693001001
Discontinued
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16
Washer (OD129 x ID66 x 12t)
 
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Part Number: 693002001
Discontinued
Not Available


17
Engine Mount
 $15.29
Part Number: 634062001
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18
Screw (M5 x 08 in, 20 Torx)
 $1.99
Part Number: 660344007
In Stock, 7 Available
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19
Tube
 $1.99
Part Number: 570373029
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20
Inner Volute
 $20.96
Part Number: 523921001
In Stock, 1 Available
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21
Fan
 $7.90
Part Number: 518265004
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22
Outer Volute
 $11.48
Part Number: 524586001
In Stock, 1 Available
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23
Outer Volute Cover
 $1.99
Part Number: 523926003
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Ships in 5 - 11 business days

24
Screw (10-14 x 16 mm)
 $1.99
Part Number: 660626006
In Stock, 7 Available
Ships within 1 business day

25
Eyelet
 $2.99
Part Number: 638088004
In Stock, 4 Available
Ships within 1 business day

26
Eyelet Support
 $1.99
Part Number: 522600003
Ships In 5 - 11 Business Days
Ships in 5 - 11 business days

Page C
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 Fig #
A-7
Spring
 $1.99
Part Number: 679950001
In Stock, 9 Available
Ships within 1 business day

1
Screw M5, Special
 $1.19
Part Number: 660510009
Ships In 5 - 11 Business Days
Ships in 5 - 11 business days

2
Air Purge Bulb
 $4.05
Part Number: 300780002
In Stock, 25+ Available
Ships within 1 business day

3
Spring Washer
 $1.07
Part Number: 678343002
Ships In 5 - 11 Business Days
Ships in 5 - 11 business days

4
Gasket
 $3.99
Part Number: 562927001
In Stock, 17 Available
Ships within 1 business day

5
Screw (M5 X 50 mm)
 $3.99
Part Number: 660347001
In Stock, 5 Available
Ships within 1 business day

6
Screw (M5 x 08 in)
 $1.99
Part Number: 661832001
In Stock, 5 Available
Ships within 1 business day

7
Air Box Cover
 $8.36
Part Number: 533688001
In Stock, 5 Available
Ships within 1 business day

8
Washer (#12)
 $1.99
Part Number: 671080001
In Stock, 5 Available
Ships within 1 business day

9
Carburetor
 $69.88
Part Number: 308054093
In Stock, 21 Available
Ships within 1 business day

10
Air Box Cover
 $8.36
Part Number: 533688001
In Stock, 5 Available
Ships within 1 business day

11
Air Filter Box
 $3.99
Part Number: 900777004
In Stock, 8 Available
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12
Air Filter
 $5.15
Part Number: 900777005
In Stock, 25+ Available
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13
Screw (1/4-20 x 5/8 in.)
 $2.99
Part Number: 660612001
In Stock, 10 Available
Ships within 1 business day

14
Gasket
 $3.99
Part Number: 901653007
In Stock, 3 Available
Ships within 1 business day

15
Exhaust Assembly
 $47.91
Part Number: 309330004
In Stock, 3 Available
Ships within 1 business day

16
Flywheel Nut
 $3.99
Part Number: 678067001
In Stock, 3 Available
Ships within 1 business day

17
Washer, Flat 11/32 in.
 
No Longer Available [ More Info ]
Part Number: 631049001
Discontinued
Not Available


18
Flywheel Assembly
 $17.26
Part Number: 309013003
In Stock, 6 Available
Ships within 1 business day

19
Short Block Assembly
 $70.54
Part Number: 309842001
In Stock, 13 Available
Ships within 1 business day

20
Spark Plug
 $7.99
Part Number: 870170001
In Stock, 25+ Available
Ships within 1 business day

21
Gasket
 $3.99
Part Number: 562927003
In Stock, 7 Available
Ships within 1 business day

22
Heat Dam
 $6.08
Part Number: 524583003
Ships In 5 - 11 Business Days
Ships in 5 - 11 business days

23
Spacer
 $1.99
Part Number: 638091011
In Stock, 2 Available
Ships within 1 business day

24
Screw (M4)
 $1.99
Part Number: 983645005
In Stock, 5 Available
Ships within 1 business day

25
Washer (Heat Dam)
 $1.99
Part Number: 638980003
Ships In 5 - 11 Business Days
Ships in 5 - 11 business days

26
Choke Lever
 
No Longer Available [ More Info ]
Part Number: 524556007
Not Available

Miscellaneous Parts
 Fig #
A-800
Operators Manual (961469001)
 
No Longer Available [ More Info ]
Part Number: 990000036
Not Available

Blower Parts  Vacuum Parts
Repair Guides
How to Replace the Ignition Module on a Ryobi Handheld Gas Blower

Blower won't start? Step-by-step instructions show you how to remove and install the ignition module on your Ryobi handheld gas blower.

How to Maintain a 2-Cycle Handheld Leaf Blower

Maintain your leaf blower. Step-by-step guide shows you how to rebuild the carburetor, replace the filters, and replace the spark plug on a handheld blower.

Discussion
Discussion for the Ryobi RY08420A Backpack Blower

Discussion is closed. To ask our experts a question about a part, use the Q&A feature on our product pages.
Question: Ryobi RY08420A

kennbunn

Started Fine. Ran ok but seemed to bog a little under acceleration but would come up to speed. Then quit running while idling. Would not restart. Depressing primer does not pull fuel to primer. It sort of whistles.
Question: Throttle Cable

ryobihead31

replaced carbureuter what hole on carbureuter to a put throttle cable tip in
Hello ryobihead31 Try inserting it in the hole that provides the best action and quickest response from the throttle trigger. There should be very little slack in the cable once it is attached to the carburetor. Some slack is OK. Too much slack in the cable and it will not be able to achieve Wide Open Throttle.
Question: Flooding?

jsnowash

Can't get our backpack blower started. The engine previously seized. I was able to free it up. The engine cranks, but won't start. I've got spark, it seems like the engine might be flooding. Not sure what to try next to try & get it going!
Hi jsnowash If the unit has some age on it, it may be time to pull the carburetor and install either 1. Gasket and Diaphragm Kit...or 2. Complete Carburetor Rebuild Kit. Either one restores the ability of the carburetor to work properly IF there there are no other internal failures; the most aggravating of which being a stuck check valve in the carburetor main nozzle.
If the engine is flooding, pull the spark plug, clean the spark plug...leave it OUT of the engine and let it engine dry out inside. On some Ryobis there is a lower crankcase cover that can be removed in the back...helping to dry the crankcase out even more.
Question: No Spark

Salazar

Hello i dont have no spark on my blower i change the Ignition Module Assembly and still no spark i dont know what is wrong with it
Yes i did i put a credit card in the middle of coil and the flywheel
I got spark now thank you but it still doesnt start i get gas 2 the spark plug and i have spark but it doesnt start.
Salazar A number of things could be causing the no -start. Try starting it by removing the plug and spraying carb/choke cleaner into the cylinder. That will tell us if the engine and timing are ok.....if it runs a few seconds.
Question: Carburetor Adjustment

1557529

Question to shotout - Thanks for the info in your reply to hard starting. How can I adjust the carb (no tamper screws)?
Hello Since i suppose you don't have the special tool; use a 22 gauge automotive type wire connector. I find that a female spade wire terminal connector. works great. Just tap the open end onto the mixture screw head until it is tight, and then you can turn by hand or insert flat blade screwdriver into the female spade end. Here are INSTRUCTIONS on how to properly adjust the carburetor.

link removed
Hi i dont have any spark on my blower i change the Ignition Module Assembly and still no spark i dont now what is wrong.
Hi Salazar Did you set the "air-gap" between the coil leg and the flywheel to about .010"? If the coil IS good and the gap is correct AND the flywheel magnets are not real weak, you should get spark.
Yes i did i put a credit card in the middle of coil and the flywheel
How can check the flywheel.
How can i check the flywheel if it works or not
Hi Salazar To test strength of flywheel magnets, hold a smaller flat blade screwdriver about an inch from each magnet. The magnet should PULL the blade into it. If it does not, it is weak, and may fail to excite the windings in the magneto.
The flywheel the magnets they have strength but it still have no spark
Salazar, How old is your machine and what is the make and model? THE ON/Off switch wiring or the switch itself may be the problem.
The model is RY08420A year is 2015
Salazar, OK then, it should be close to like new. Check the wiring from the coil to the on/off switch. When you disassembled and reassembled , something could have messed up. Do you know how to check the switch with a multitester? Also! spray some carb cleaner into the engine and try and start it!
Ok i will try that thanks
I put carb cleaner and it did not start
Salazar, How are you checking for spark? It appears from the diagram that the end of the wiring harness to the ignition module plugs into this momentary ON./OFF switch. This is a typical plastic rocker switch. Another thing. The ignition module has to be grounded to work properly. The mounting surface for it may provide the ground in this case. Check that the wiring harness from your ignition coil is properly mounted on the switch. Here is the switch.

http://www.ereplacementparts.com/momentary-contact-switch-p-565486.html

Here is the ignition module:

http://www.ereplacementparts.com/ignition-module-assembly-p-1742485.html

Make sure you are using a KNOWN GOOD spark plug when you test for spark.
Do the air gap over using a paper business card, not a credit card. Credit card may be too thick.
I got a tool 2 check 4 spark and i change the ignition module already before i was not getting spark and now i am is because i use a credit card before and now i use a business card and the spark plug is a champion
I got a tool 2 check 4 spark and i change the ignition module already before i was not getting spark and now i am is because i use a credit card before and now i use a business card and the spark plug is a champion
The blower tries 2 start but ot doesnt start
Salazar, I understand. Is the spark plug getting wet with gas when trying to start? WHAT ratio do you mix your 2 stroke fuel? How many ounces of oil per gallon of gas? What kind of oil have you been using? Have you run the blower a lot? I ask these things to give me an idea what condition the motor may be in!
Since your blower burns oil, it forms carbon in the engine and muffler. Too much oil causes too much carbon. That can clog the muffler or cause a piston ring to stick. That results in compression loss and engine will not start.
Question: Hard Starting

1552393

so I have replaced everypart except for the block and the wheel assembly. I still have a hard starting problem. like no starting. but it does fire. I Aam getting gas into the plug.the design on the carb. is terrible. the guy who designed it should of been fired.i can see by reading all about this model everyone has problems and they all say its junk.but link removed you tell me what the gap should be for the ignition and flywheel should be. could poor magnetics cause for poor spark? would Ryobi ever redesign something like this?thanks for your help. just frustrated.
Hello Your frustration is understood. I know working on these is a blast! Have spent a whole lot of time on them myself. Personally, the Poulan (they make the engine) machines ARE good when they run good, but a pain when they don't. Their performance is not bad, it is keeping UP that performance that is our challenge. The air gap between your coil legs and the magnets should be about .010" or the thickness of a business card. Use one as a tool to do it.
Magnets are funny. They do weaken over time. They can cause no starts if they become too weak. I am dealing with one doing just that currently on an Echo. They can weaken to the point where they no longer excite the windings in the coil. Some flywheels get their cast in aluminum timing key worn out by the steel crankshaft. Then the flywheel starts slipping. If it slips enough, a no start can also result. Ask me how I know! They can call them junk. A lot of Poulan (they make engines for Ryobi, Homelite, Craftsman, Toro, Troy Bilt etc.) engines can deliver great performance. It is the other parts that usually cause the problems. Need anything else, come back for more.
As far as redesigning, a redesign most likely would result in a higher price and buyers would look elsewhere...like to Echo and Husqvarna. The future may hold oil injection for the 2 stroke engines as some other machines already have it. It is not NEW technology, but it has not made it to the lower priced lawn equipment realm yet.
The carburetors are made in China for the most part. The problem with them now is HOW LEAN the US buyers make them set them. They have to pass EPA C.A.R.B. Tier III emissions standards. They do not want the general public to mess with them and change the settings, hence the tamper proof mixture screws. There are ways to get around this however and you learn after fooling with them for a while.
thank you so much for the info.One more question please? Are there points under the flywheel? As you can tell I'm not familiar with this type of motor.this was bought a year ago and ran about a dozen times. got hard to start and ive been replacing everything. So I just ordered the flywheel and a kill switch although I bypassed the kill switch and it didn't help. spare parts if I ever get it going. thanks again.
Hi alienmic No, they quit utilizing points and condensor on these many years ago. They went from points to CDI (capacitor disharge ignition) to solid state transistorized ignition. That is what most all of the machines like yours have now.
If you have a GOOD carburetor and a GOOD flywheel, you should be able to solve the no start problem.
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