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  Ryobi RY34421 4 Cycle Gas String Trimmer Parts
Ryobi 4 Cycle Gas String Trimmer Replacement  For Model RY34421

Ryobi 4 Cycle Gas String Trimmer Replacement Parts For Model RY34421

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Page A
Ryobi RY34421 4 Cycle Gas String Trimmer Page A Diagram
 Fig #
1
Screw
 $3.99

Part Number:660563002

In Stock

In Stock

Note: 9-16-19 (Rev:02)
 $3.99
In Stock
 $3.99
2
Control Handle Assembly
 $4.99

Part Number:120950026

In Stock

In Stock
 $4.99
In Stock
 $4.99
3
Trigger Lock
 $5.19

Part Number:518695002

In Stock

In Stock
 $5.19
In Stock
 $5.19
4
Strap Hanger
 $3.99

Part Number:638431001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
5
Momentary Switch Assembly
 $4.99

Part Number:760700001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 10-4-18 (Rev:05)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
6
Rear Handle
 $4.99

Part Number:570234010

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 2-13-19 (Rev:02)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
7
Hex Nut (m63 X 1)
 $3.99

Part Number:678029002

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $3.99
In Stock
 $3.99
8
Fuel Cap Assembly Obsolete - Not Available
 $2.99

Part Number:310816002

Discontinued

Discontinued
 $2.99
Discontinued
9
Air Box Cover Obsolete - Not Available
 $3.99

Part Number:521403001

Discontinued

Discontinued
 $3.99
Discontinued
10
Oil Cap W/ O-ring
 $4.99

Part Number:310302001

In Stock

In Stock

Note: 9-17-19 (Rev:04)
 $4.99
In Stock
 $4.99
11
Spark Plug
 $4.99

Part Number:870301002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
12
Bolt
 $4.99

Part Number:660634001

In Stock

In Stock

Note: 2-5-20 (Rev:01)
 $4.99
In Stock
 $4.99
13
Screw (m6 X 20 Mm)
 $4.99

Part Number:660697002

In Stock

In Stock

Note: 11-28-16 (Rev:02)
 $4.99
In Stock
 $4.99
14
Screw (M5 x 11 mm) Obsolete - Not Available
 $4.99

Part Number:660510005

Discontinued

Discontinued
 $4.99
Discontinued
15
Front Handle Assembly Obsolete - Not Available
 $4.99

Part Number:308991001

Discontinued

Discontinued
 $4.99
Discontinued
16
Front Handle Obsolete - Not Available
 $5.54

Part Number:518738001

Discontinued

Discontinued
 $5.54
Discontinued
17
Bolt
 $5.19

Part Number:660643008

In Stock

In Stock

Note: 5-29-19 (Rev:03)
 $5.19
In Stock
 $5.19
18
Washer
 $5.24

Part Number:678008001

In Stock

In Stock

Note: 11-28-16 (Rev:02)
 $5.24
In Stock
 $5.24
19
Wing Nut, 1/4-20
 $5.24

Part Number:PS02453

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 11-28-16 (Rev:02)
 $5.24
Usually ships in 7 - 12 business days
 $5.24
20
Top Cover Assembly Obsolete - Not Available
 $12.57

Part Number:310536001

Discontinued

Discontinued
 $12.57
Discontinued
21
Throttle Trigger
 $5.19

Part Number:518696002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $5.19
Usually ships in 7 - 12 business days
 $5.19
22
Throttle Trigger Spring
 $4.99

Part Number:690694002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 2-13-19 (Rev:02)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
23
O-ring
 $3.99

Part Number:570400001

In Stock

In Stock

Note: 9-17-19 (Rev:04)
 $3.99
In Stock
 $3.99
24
Throttle Cable
 $4.99

Part Number:308842007

In Stock

In Stock
 $4.99
In Stock
 $4.99
25
Hot Surface Label
 $3.99

Part Number:940680023

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
26
Starting Label Obsolete - Not Available
 $2.99

Part Number:940734067

Discontinued

Discontinued
 $2.99
Discontinued
27
Upper Boom Assy.
 $18.33

Part Number:308470056

In Stock

In Stock
 $18.33
In Stock
 $18.33
28
Warning Decal
 $3.99

Part Number:940657034

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
29
Logo Label
 $3.99

Part Number:940705020

In Stock

In Stock

Note: 9-17-19 (Rev:04)
 $3.99
In Stock
 $3.99
30A
C430 Label
 $3.99

Part Number:940991026

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:04)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
30B
S430 Label
 $3.99

Part Number:940991027

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:04)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
31
Screw (#6-19 X 1/2 In.)
 $4.99

Part Number:T660619001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
32
Ce Cover (bottom)
 $4.99

Part Number:518548001

In Stock

In Stock

Note: 9-17-19 (Rev:04)
 $4.99
In Stock
 $4.99
33
Lead Assembly
 $5.38

Part Number:308431002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $5.38
Usually ships in 7 - 12 business days
 $5.38
34
Combustion Warning Label
 $4.99

Part Number:940654088

In Stock

In Stock

Note: 2-5-20 (Rev:01)
 $4.99
In Stock
 $4.99
35
Choke Label
 $4.99

Part Number:940216002

In Stock

In Stock
 $4.99
In Stock
 $4.99
36
Hang Tag
 $3.99

Part Number:940971028

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
37
Spring
 $4.99

Part Number:678818001

In Stock

In Stock
 $4.99
In Stock
 $4.99
38
Spring
 $4.99

Part Number:06713

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $4.99
In Stock
 $4.99
801
Operators Manual Obsolete - Not Available
 $2.99

Part Number:987000857

Discontinued

Discontinued
 $2.99
Discontinued
Page B
Ryobi RY34421 4 Cycle Gas String Trimmer Page B class=
 Fig #
1
Starter Grip
 $4.99

Part Number:511731004

In Stock

In Stock

Note: 3-08-19 (Rev:02)
 $4.99
In Stock
 $4.99
2
Rope-Starter Obsolete - Not Available
 $2.99

Part Number:9789904

Discontinued

Discontinued
 $2.99
Discontinued
3
Screw
 $4.99

Part Number:660466001

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $4.99
In Stock
 $4.99
4
Screw
 $4.99

Part Number:660970001

In Stock

In Stock

Note: 11-28-16 (Rev:02)
 $4.99
In Stock
 $4.99
5
Starter Housing Assembly
 $25.56

Part Number:310304001

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $25.56
In Stock
 $25.56
6
Clutch Assembly
 $5.32

Part Number:300960002

In Stock

In Stock

Note: 11-28-16 (Rev:02)
 $5.32
In Stock
 $5.32
7
Washer
 $4.99

Part Number:638090001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 11-28-16 (Rev:02)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
8
Starter Baffle
 $4.99

Part Number:518994001

In Stock

In Stock
 $4.99
In Stock
 $4.99
9
Spring And Container
 $4.99

Part Number:638033001

In Stock

In Stock

Note: 9-27-18 (Rev:02)
 $4.99
In Stock
 $4.99
10
Starter Pulley Obsolete - Not Available
 $4.99

Part Number:521519001

Discontinued

Discontinued

Note: 1-24-20 (Rev:01)
 $4.99
Discontinued
11
Air Dam
 $3.99

Part Number:518996001

In Stock

In Stock
 $3.99
In Stock
 $3.99
12
Pulley Retainer
 $4.99

Part Number:638389001

In Stock

In Stock

Note: 9-22-17 (Rev:01)
 $4.99
In Stock
 $4.99
13
Spacer Tube Obsolete - Not Available
 $3.99

Part Number:638284002

Discontinued

Discontinued

Note: 9-17-19 (Rev:02)
 $3.99
Discontinued
14
Washer
 $4.99

Part Number:PS05268

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $4.99
In Stock
 $4.99
15
Flywheel Assembly
 $13.03

Part Number:309011001

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $13.03
In Stock
 $13.03
16
Short Block Assy. Obsolete - Not Available
 $174.46

Part Number:309962004

Discontinued

Discontinued
 $174.46
Discontinued
17
Washer Obsolete - Not Available
 $2.99

Part Number:638576001

Discontinued

Discontinued
 $2.99
Discontinued
18
Screw (M4 x 19 mm, Shoulder) Obsolete - Not Available
 $2.99

Part Number:660970008

Discontinued

Discontinued

Note: 9-17-19 (Rev:02)
 $2.99
Discontinued
19
Fuel Tank Assembly Obsolete - Not Available
 $10.48

Part Number:310585012

Discontinued

Discontinued

Note: 9-17-19 (Rev:04)
 $10.48
Discontinued
19
Fuel Tank Assembly Obsolete - Not Available
 $10.48

Part Number:310585012

Discontinued

Discontinued

Note: 9-17-19 (Rev:04)
 $10.48
Discontinued
20
Hex Nut
 $4.99

Part Number:678868001

In Stock

In Stock
 $4.99
In Stock
 $4.99
21
Air Filter Base
 $5.70

Part Number:308398004

In Stock

In Stock
 $5.70
In Stock
 $5.70
22
Carburetor Assembly Obsolete - Not Available
 $43.49

Part Number:309375002

Discontinued

Discontinued

Note: 9-17-19 (Rev:02)
 $43.49
Discontinued
23
Air Baffle
 $4.99

Part Number:518692002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $4.99
Usually ships in 7 - 12 business days
 $4.99
24
Carburetor Gasket
 $4.99

Part Number:900809013

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $4.99
In Stock
 $4.99
25
Screw (m5 X 23 Mm)
 $3.99

Part Number:660629003

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
26
Heat Dam
 $5.19

Part Number:521400001

In Stock

In Stock
 $5.19
In Stock
 $5.19
27
Bolt
 $3.99

Part Number:661509002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
28
Heat Dam Gasket
 $5.19

Part Number:901657002

In Stock

In Stock
 $5.19
In Stock
 $5.19
29
Breather Hose
 $5.19

Part Number:570710002

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $5.19
In Stock
 $5.19
30
Check Valve
 $4.99

Part Number:308826002

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $4.99
In Stock
 $4.99
31
Breather Hose
 $5.19

Part Number:570710003

In Stock

In Stock

Note: 9-17-19 (Rev:04)
 $5.19
In Stock
 $5.19
32
Breather Hose
 $5.19

Part Number:570710004

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $5.19
Usually ships in 7 - 12 business days
 $5.19
33
Breather Fitting
 $5.19

Part Number:570401001

In Stock

In Stock
 $5.19
In Stock
 $5.19
34
Screw (m4 X 12 Mm)
 $3.99

Part Number:660466002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
35
Muffler Housing
 $3.99

Part Number:518995001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
36
Muffler Gasket
 $3.99

Part Number:901702002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
37
Muffler Assembly
 $6.48

Part Number:309320002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:04)
 $6.48
Usually ships in 7 - 12 business days
 $6.48
38
Muffler Bolt (m5 X 42 Mm)
 $3.99

Part Number:661143001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
39
Electrical Lead Wire Assembly
 $3.99

Part Number:308863022

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
40
Ignition Module
 $15.08

Part Number:309263002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $15.08
Usually ships in 7 - 12 business days
 $15.08
41
Screw (m4 X 19 Mm)
 $4.99

Part Number:660968001

In Stock

In Stock

Note: 9-22-17 (Rev:01)
 $4.99
In Stock
 $4.99
42
Top Housing Obsolete - Not Available
 $6.63

Part Number:518142002

Discontinued

Discontinued
 $6.63
Discontinued
43
Screw (m4 X 27mm)
 $3.99

Part Number:660780002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:04)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
44
Cam Cover
 $3.99

Part Number:638692001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
45
Gasket Obsolete - Not Available
 $3.99

Part Number:901705001

Discontinued

Discontinued
 $3.99
Discontinued
46
O-ring
 $3.99

Part Number:570400002

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-17-19 (Rev:02)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
47
Gasket
 $5.19

Part Number:570709002

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $5.19
In Stock
 $5.19
48
Oil Pan
 $6.26

Part Number:518924002

In Stock

In Stock
 $6.26
In Stock
 $6.26
49
Screw
 $3.99

Part Number:660925003

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $3.99
In Stock
 $3.99
50
Timing Belt Obsolete - Not Available
 $4.99

Part Number:901656002

Discontinued

Discontinued
 $4.99
Discontinued
Page C
Ryobi RY34421 4 Cycle Gas String Trimmer Page C class=
 Fig #
1
Expand-it Label
 $3.99

Part Number:940726013

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-16-19 (Rev:03)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
2
Decal-warning
 $3.99

Part Number:984032001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
3
Curved Shaft Assembly Obsolete - Not Available
 $20.10

Part Number:308841002

Discontinued

Discontinued
 $20.10
Discontinued
4
Fastener Kit
 $4.99

Part Number:A09361

In Stock

In Stock
 $4.99
In Stock
 $4.99
5
Grass Deflector Assembly
 $3.99

Part Number:T308744001

In Stock

In Stock

Note: 11-28-16 (Rev:02)
 $3.99
In Stock
 $3.99
6
Right Hand Thread Spool Retainer Obsolete - Not Available
 $2.99

Part Number:308042002

Discontinued

Discontinued

Note: 11-28-16 (Rev:02)
 $2.99
Discontinued
7
Dual Spool-Fixed Line Obsolete - Not Available
 $7.71

Part Number:310734002

Discontinued

Discontinued
 $7.71
Discontinued
8
String Head Housing
 $4.99

Part Number:310643003

In Stock

In Stock

Note: 10-8-18 (Rev:02)
 $4.99
In Stock
 $4.99
9
Spring
 $4.99

Part Number:06713

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $4.99
In Stock
 $4.99
10
Spool Obsolete - Not Available
 $8.51

Part Number:312223001

Discontinued

Discontinued
 $8.51
Discontinued
11
String Head Assembly Obsolete - Not Available
 $5.38

Part Number:309562007

Discontinued

Discontinued

Note: 11-28-16 (Rev:02)
 $5.38
Discontinued
12
Hanger Cap
 $4.99

Part Number:518019004

In Stock

In Stock
 $4.99
In Stock
 $4.99
 Fig #
1
Expand-it Label
 $3.99

Part Number:940726013

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-16-19 (Rev:03)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
2
Decal-warning
 $3.99

Part Number:984032001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
3
Straight Shaft Assembly Obsolete - Not Available
 $15.36

Part Number:308035013

Discontinued

Discontinued
 $15.36
Discontinued
4
Screw (10-24 X 5/8 In.)
 $5.24

Part Number:983774003

In Stock

In Stock

Note: 12-12-18 (Rev:01)
 $5.24
In Stock
 $5.24
5
String Guard Clamp
 $5.19

Part Number:PS04420

In Stock

In Stock

Note: 10-8-18 (Rev:02)
 $5.19
In Stock
 $5.19
6
Spacer
 $4.99

Part Number:518367001

In Stock

In Stock

Note: 10-2-19 (Rev:09)
 $4.99
In Stock
 $4.99
7
Screw (1/4-20 X 1-1/4 In.)
 $4.99

Part Number:983381007

In Stock

In Stock

Note: 10-2-19 (Rev:01)
 $4.99
In Stock
 $4.99
8
Gear Head
 $25.45

Part Number:308210009

In Stock

In Stock

Note: 11-28-16 (Rev:02)
 $25.45
In Stock
 $25.45
9
Flanged Washer Obsolete - Not Available
 $2.99

Part Number:678011002

Discontinued

Discontinued

Note: 11-28-16 (Rev:02)
 $2.99
Discontinued
10
String Head Adapter
 $5.19

Part Number:678019002

In Stock

In Stock

Note: 10-8-18 (Rev:02)
 $5.19
In Stock
 $5.19
11
Spool Retainer
 $4.99

Part Number:308042003

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 11-28-16 (Rev:02)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
12
Dual Spool-Fixed Line Obsolete - Not Available
 $7.71

Part Number:310734002

Discontinued

Discontinued
 $7.71
Discontinued
13
Grass Deflector Obsolete - Not Available
 $8.81

Part Number:308473001

Discontinued

Discontinued
 $8.81
Discontinued
14
Wing Screw
 $5.19

Part Number:660886001

In Stock

In Stock

Note: 10-8-18 (Rev:02)
 $5.19
In Stock
 $5.19
15
Hanger Cap
 $4.99

Part Number:518019004

In Stock

In Stock
 $4.99
In Stock
 $4.99
16
String Head Assembly Obsolete - Not Available
 $5.38

Part Number:309562007

Discontinued

Discontinued

Note: 11-28-16 (Rev:02)
 $5.38
Discontinued
17
String Head Housing
 $4.99

Part Number:310643003

In Stock

In Stock

Note: 10-8-18 (Rev:02)
 $4.99
In Stock
 $4.99
18
Spring
 $4.99

Part Number:06713

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $4.99
In Stock
 $4.99
19
Spool Obsolete - Not Available
 $8.51

Part Number:312223001

Discontinued

Discontinued
 $8.51
Discontinued
 Fig #
Trimmer Parts

Repair Guides for Ryobi 4 Cycle Gas String Trimmer RY34421

How to Clean a Four-Cycle Engine Carburetor

Get the best results from your four-cycle engine lawn equipment with this video's advice on cleaning carburetors with spray cleaner or a sonic cleaner.

How to Fix the Starter on a Ryobi Trimmer

Replacing the spring in your trimmer's starter assembly is easy with these professional tips, and it will even save you money on parts.

Quick Fix: How to Replace the Spark Plug in a Small Engine

This video will help you replace the spark plug on a small engine which will help get your gas powered equipment up and running again.

How to Replace the Fuel Filters in Your Outdoor Power Equipment

This video will help you troubleshoot your fuel-line replacement repairs.

Questions & Answers for Ryobi RY34421


will a 310413001 spool fit a Ryobi34421 trimmer?
Richard for model number ryobi 34421 asked on 2022-06-16
Hello Richard, thank you for writing. The correct String Head Assembly for the model is 309562007. If you need help placing an order, customer service is open 7 days a week. Please feel free to give us a call. We look forward to hearing from you.
eReplacementParts Team June 16, 2022
eReplacementParts.com
7174 South 400 West
Suite 5
Midvale, UT 84047
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