Easy
Less than 15 minutes
This is an authentic OEM sourced replacement primer bulb assembly designed for use with Homelite and Ryobi handheld lawn and garden equipment. This bulb system allows user to get fuel into the carburetor for cold starting. At some time the primer will lose its elasticity or crack requiring replacement. It is made from flexible rubber material in a plastic housing and it is sold individually.
Primer 300780003
OEM part for: Ryobi, Homelite
Part Number: 300780003
$3.99
In Stock
Ships within 1 business day 
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Frequently Purchased Together ?
Compatibility
This part will fit the following 18 machines
Ryobi
RY09460 4 Cycle Handheld Blower View Diagrams & Manuals
RY09440 Blower View Diagrams & Manuals
RY09466 BLOWER View Diagrams & Manuals
RY3714 Ry3714 38cc Chain Saws Mfg. No. 090382013 8-3-21 (Rev:02) View Diagrams & Manuals
RY3714VNM Ry3714vnm 38cc Chain Saws Mfg. No. 095382013 8-3-21 (Rev:02) View Diagrams & Manuals
RY3716 Ry3716 38cc Chain Saws Mfg. No. 090382012 8-3-21 (Rev:02) View Diagrams & Manuals
RY3716VNM Ry3716vnm 38cc Chain Saws Mfg. No. 095382012 8-3-21 (Rev:02) View Diagrams & Manuals
RY3818 Ry3818 18 In. 38cc Chain Saw Mfg. No. 090382011 8-3-21 (Rev:02) View Diagrams & Manuals
RY3818VNM Ry3818vnm 18 In. 38cc Chain Saw Mfg. No. 095382011 8-3-21 (Rev:02) View Diagrams & Manuals
Homelite
UT10544 14 In. 35cc Chainsaw View Diagrams & Manuals
UT10546 14 In. 35cc Chainsaw View Diagrams & Manuals
UT10564 16 In. 38cc Chainsaw View Diagrams & Manuals
UT10566 16 In. 38cc Chainsaw View Diagrams & Manuals
UT10584 18 In. 42cc Chainsaw View Diagrams & Manuals
UT10586 18 In. 42cc Chainsaw View Diagrams & Manuals
UT10548 14 In. 35cc Chainsaw View Diagrams & Manuals
UT10568 16 In. 38cc Chainsaw View Diagrams & Manuals
UT10588 18 In. 42cc Chainsaw View Diagrams & Manuals
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This item works with the following types of products:
- Blower Parts
- Chain Saw Parts
- Saw Parts
Customer Part Reviews ?
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Easy, Fast, Professional.
Thank you for your support in getting me back into action fast. The prime bulb was cracked on a Ryobi chainsaw. Went to local Hardware stores, but the generic bulbs did not match. ReplacementParts had the exact bulb needed. And directions to innstall the bulb. Thanks again.
Guest -
June 6, 2022
Verified Purchase
Easy repair.
Arrived in good time and worked great.
Guest -
November 19, 2021
Verified Purchase
New carb fit and works great
Part arrived on schedule and was install with ease. leaf blower runs like new
Guest -
July 27, 2021
Verified Purchase
Correct part. 5 minute replacement. Perfect fit
Chainsaw purge bubble cracked. Order a new one. Perfect fit. Chainsaw started on the first pull after I installed the new purge bubble.
Robert -
October 9, 2019
Verified Purchase
Perfect
Part was a perfect fit. Installed and leaf blower started right up.
Guest -
September 5, 2019
Verified Purchase
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t days ago
Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Primer bulb was cracked
Jon - April 24, 2016
👍 21 of 24 people found this instruction helpful
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, None
Parts Used
Use the hand screw to remove the cover that houses the screen filter and primer bulb. Take care of the little gasket. Remove the two fuel lines from the old primer bulb. Small needle nose pliers work nicely. Take a thin bladed screwdriver and pop out the old primer bulb. Snap in the new primer bulb taking care to note the position of the old bulb. Reattach the fuel lines. Reattach the cover. My blower started right up after I installed a new spark plug and this new primer bulb
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Primer dry rot
wesley - June 6, 2016
👍 4 of 4 people found this instruction helpful
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, none
Parts Used
Easy repair, first disconnected the spark plug wire. Disconnect the fuel lines, then remove the primer from the air box base and secure the new one in place. Reattach fuel lines and the spark plug wire.
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Fuel lines broke and primer cracked
Bart - October 3, 2016
👍 4 of 5 people found this instruction helpful
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
1. Detached fuel lines from fuel tank to primer.
2. Remove screws holding fuel tank to blower.
3. Remove fuel tank.
4. Attach new fuel tank.
5. Remove carburetor cover from back of blower.
6. Remove cracked primer from bracket using the two clips on the back of primer.
7. Attach new primer to bracket.
8. Re-attach fuel lines primer from fuel tank.
9. Re-attach carburetor cover.
2. Remove screws holding fuel tank to blower.
3. Remove fuel tank.
4. Attach new fuel tank.
5. Remove carburetor cover from back of blower.
6. Remove cracked primer from bracket using the two clips on the back of primer.
7. Attach new primer to bracket.
8. Re-attach fuel lines primer from fuel tank.
9. Re-attach carburetor cover.
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Primer bulb cracked
John - January 16, 2016
👍 3 of 4 people found this instruction helpful
Tool Type
Blower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Remove the fuel lines from the primer assembly, remove the primer from the air box base. Install the new primer, then hook up the fuel lines.
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Chain and bar fell off
jimmy - February 2, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set
Installed the cover assy and the bulb primer. Perfect replacements!
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Primer broke
Lawrence - December 21, 2022
Tool Type
Blower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Socket set
Replaced primer, air filter and spark plug
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Primer bulb cracked
Jerry - June 27, 2020
Tool Type
Blower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Fingers
Parts Used
Pulled old primer bulb off & replaced with new one. No special tools needed.
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Gasoline priming bulb leaked excessively
Leland - April 29, 2020
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
1. Using Torx driver remove two screws on top cover
2. Raise top cover to see back of priming bulb and two fuel lines
3. Note location that fuel lines come from and what ports on priming bulb the lines attach to
4. Using flat blade screwdriver push tabs that hold priming bulb in place down
5. Pull out priming bulb
6. Using needle nose pliers removed gas lines from nipples on priming bulb
7. Take replacement priming bulb and install gas lines on to using pliers
8. Push priming bulb into plastic bracket
9. Reinstall top cover and tighten screws.
2. Raise top cover to see back of priming bulb and two fuel lines
3. Note location that fuel lines come from and what ports on priming bulb the lines attach to
4. Using flat blade screwdriver push tabs that hold priming bulb in place down
5. Pull out priming bulb
6. Using needle nose pliers removed gas lines from nipples on priming bulb
7. Take replacement priming bulb and install gas lines on to using pliers
8. Push priming bulb into plastic bracket
9. Reinstall top cover and tighten screws.
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Primier bulb failed
Sears - April 23, 2020
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set, None
Took off top cover squeezing the locks on the primier bulb pulled thru took hoses off discarded and put new one in and put new air filter in and changed plug then put cover back on.
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Primer bulb was leaking fuel
Ken - November 15, 2019
Tool Type
Blower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers
Parts Used
Removed fuel lines from primer & removed primer (primer just snaps in and out). Snapped in new primer & attached fuel lines.
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
