Easy
15-30 minutes
This replacement primer bulb is specially designed for use with Makita trimmers and blowers. It is not an aftermarket equivalent, this is a genuine part sourced directly from original equipment manufacturer. By pressing the bulb, it will purge the air out of the carburetor. Then, the fuel will be forced up from the fuel tank through the fuel line into the carburetor. The excess fuel will be sent back into the tank through the return line. Over time bulbs tend to deteriorate and crack requiring replacement.
Replacing this primer bulb you will need a screwdriver.
• Disconnect the spark plug
• Remove the air filter cover
• Drain the fuel from the tank
• Remove the air cleaner base
• Remove the carburetor
• Remove the old primer bulb
• Secure the new primer bulb
• Reassemble and test the equipment
Primer Pump 424314-7
OEM part for: Makita
Part Number: 424314-7
Ships within 1 business day 
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Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 84 machines
Makita
This item works with the following types of products:
- Hedge Trimmer Parts
- Trimmer Parts
- Blower Parts
This part replaces obsolete part #: 5246001150
Repair Videos ?
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Replacing primer bulbs in small engines is one of the most common types of tool repairs, and this article explains profe...
June 25, 2010
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Customer Part Reviews ?
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Questions & Answers ?
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Does this fit my product?Questions & Answers for Primer Pump
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.
Old primer pump was cracked
Tool Type
Blower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Blower would not start. Primer pump bulb got a crack and would not hold fuel.
Tool Type
Blower
Difficulty
Easy
Time
1-2 hours
Tools Used
Screwdriver
Lesson learned. First, print out the assembly diagram and/or taking photos of each component BEFORE disassembly.
It is amazing that this Makita 4-stroke leaf blower has run for 21 years without any repair until now. During the past year it began to get a little more difficult to start until few weeks ago when the bulb finally leaked to the point that I could not get fuel into the carb.
Thanks eReplacementParts.com for the parts and diagram availability for the home handyman ME to fix it. The local shop wanted $60 to clean the carb and replace the bulb plus a two weeks turnaround time. I spent less than $20 and got the satisfaction of being able to do it myself in half day.
Carburetor primer bulb cracked
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Primer bulb was leaking.
Tool Type
Blower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Adjustable Wrench
Parts Used
Blower would not start when cold
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Adjustable Wrench
Couldn’t rev up - wouldn’t stay on idle.
Tool Type
Grass Trimmer
Difficulty
Easy
Time
1-2 hours
Tools Used
Screwdriver, None
2. Installed new replacement parts.
Primer pump had a hole in it.
Tool Type
Grass Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
, Angled screwdriver
Parts Used
Gas leak
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
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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.
