Medium
15-30 minutes
This is a genuine manufacturer-approved replacement switch, it is specially designed for Makita backpack blowers. It is the component of the tool which allows a user to turn the unit on and off, over time components may wear out and begin to fail eventually requiring a replacement. Keep in mind this high-quality plastic body switch is sold individually.
Switch Cpl. 638640-0
OEM part for: Makita
Part Number: 638640-0
$17.51
In Stock
Order within the next 12 hours and your part ships today! 
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Frequently Purchased Together ?
Compatibility
This part will fit the following 4 machines
Makita
BHX2500 Blower View Diagrams & Manuals
BHX2500CA 24.5 cc Blower View Diagrams & Manuals
BHX2500 (Type 2) Blower View Diagrams & Manuals
PB2504 Blower View Diagrams & Manuals
This item works with the following types of products:
- Blower Parts
This part replaces obsolete part #: 665-50010-00, 6655001000
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exact replacement part for Makita gas blower
The part is an exact match for my Makita gas blower. Finding the parts needed were easy with the extensive parts diagrams available on ereplacement parts website. I've bought parts here in the past and continue to return due to the simplicity of finding the parts I need and the best prices on the web, even when factoring in the cost of shipping.
Justin -
January 11, 2023
Verified Purchase
With a little effort the blower now works like new.
I ordered the switch and the manual throttle lever for my Makita. I use this blower extensively during hay season to keep my machines clean so it gets beat up in the back of the truck. The parts are a perfect fit and I was up and running in two cups of coffee.
Guest -
May 27, 2022
Verified Purchase
PART FIT PERFECTLY!
I had to replace the switch for my Makita because I foolishly dropped the machine. This part was a perfect fit, priced well, and arrived quickly, even during the pandemic! I highly recommend and would certainly order from this company again.
Guest -
May 19, 2020
Verified Purchase
Small but important part
Exactly as needed, arrived quickly.
Guest -
July 4, 2019
Verified Purchase
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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.
Broken switch plastic slide
Raymond - June 18, 2016
👍 2 of 2 people found this instruction helpful
Tool Type
Blower
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Drilldriver
Parts Used
Removed the screws on the side body of the blower and lifted off the engine housing to allow switch body and slide to be removed. When I saw how far I had to reach to replace the full switch I simply replaced the red plastic slide and re-assembled the unit. Has worked well so far.
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smashed the kill switch. blower wouldn't shut off.
James - December 2, 2023
Tool Type
Blower
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver, Torx hex drivers #25&15
Parts Used
I dismantled outer body of the blower to get to the switch. Must remove pull start assy. Open top of the handle with screwdriver find switch remove switch from handle housing unplug the two wires to the old switch discard it.. reassemble in reverse order making sure switch wire don't get pinched and throttle cable is fine. put body housing back together and pull start assy. tighten all fasteners and make sure pullstart assy works. Check work by starting and stopping blower..
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smashed the kill switch. blower wouldn't shut off.
James - September 7, 2023
Tool Type
Blower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Torx hex drivers
Parts Used
Disassemble the complete body of the blower to get to the kill switch. remove bad switch. With new switch in place, reassemble the body the blower. Start blower to test my work. blower turn off as before. Problem solved... piece of cake.. thanks.
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broken on off switch
Donald - April 24, 2020
Tool Type
Blower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
removed broken part and replaced it from new switch
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Kill switch stopped working
Robert - April 14, 2019
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Phillips screwdriver
Parts Used
Separate the blower in half with Phillips screwdriver fed the kill switch wires down the handle and reattached with push on electrical ends
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Would not start
Doug - June 27, 2018
Tool Type
Blower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Allen Wrench
Parts Used
After replacing the possible suspects, full filter, spark plug the blower still wouldn't start. I then found this Replacement Parts.com website and it stated "29% of the time the problem is the "Kill Switch" so I ordered and installed a new Kill Switch and it started on the first pull.....Yay! You can gain access to the Kill Switch by removing the housing but un connecting and reconnecting the wires took a little MacGyvering. Good Luck
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Drop blower and broke the on off switch
Paul - July 5, 2017
Tool Type
Blower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Adjustable Wrench
Parts Used
Had to remove all housing screws
Remove air filter cover
Install switch in handle
Remove air filter cover
Install switch in handle
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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.
