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
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Frequently Purchased Together ?
Compatibility
This Primer will fit the following 18 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
This item works with the following types of products:
- Blower Parts
- Chain Saw Parts
- Saw Parts
Customer Part Reviews ?
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Does this fit my product?Questions & Answers for Primer
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
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, None
Parts Used
Primer dry rot
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, none
Parts Used
Fuel lines broke and primer cracked
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
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.
Primer bulb cracked
Tool Type
Blower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Chain and bar fell off
Tool Type
Chain Saw
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set
Primer broke
Tool Type
Blower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Socket set
Primer bulb cracked
Tool Type
Blower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Fingers
Parts Used
Gasoline priming bulb leaked excessively
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
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.
Primier bulb failed
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set, None
Primer bulb was leaking fuel
Tool Type
Blower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers
Parts Used
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
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.