Easy
Less than 15 minutes
This is an authentic Husqvarna replacement part compatible with the tools listed below. It works in conjunction with the throttle spring, part # 537011301, and a throttle cable. During this repair, dismantle handle slowly to keep control of the tensioned spring. Also be sure to take detailed note of the orientation of all associated parts. Correct positioning of these parts is vital for tool to function properly. Sold individually.
Throttle Trigger 503877903
OEM part for: Husqvarna
Part Number: 503877903
$9.96
In Stock
Ships within 1 business day 
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Compatibility
This part will fit the following 238 machines
Husqvarna
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326 HDA (E-tech 2) (2001-09) Hedge Trimmer View Diagrams & Manuals
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326 HE 4 X-Series (2003-01) Hedge Trimmer View Diagrams & Manuals
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326RX (2004-03) Brushcutter View Diagrams & Manuals
326RX (2009-05) Brushcutter View Diagrams & Manuals
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522 L (2015-10) Trimmer View Diagrams & Manuals
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535 LK Trimmer View Diagrams & Manuals
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323 LD (2002-01) Trimmer View Diagrams & Manuals
324 L Trimmer View Diagrams & Manuals
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325 E (2002-03) X-Series View Diagrams & Manuals
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325 HDA65 (20090900001-Current) X-Series Pole Hedge Trimmer View Diagrams & Manuals
325 HDA65 (20070100001-20090900000) X-Series Pole Hedge Trimmer View Diagrams & Manuals
326 HDA55 (20054000001-20090900000) X-Series Pole Hedge Trimmer View Diagrams & Manuals
326 HDA55 (20013500001-20033100000) X-Series Pole Hedge Trimmer View Diagrams & Manuals
327 HDA65 (20150500001-current) Pole Hedge Trimmer View Diagrams & Manuals
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Show More Compatible Models
This item works with the following types of products:
- Blower Parts
- Trimmer Parts
- Pole Saw Parts
- Saw Parts
- Edger Parts
- Hedge Trimmer Parts
- Pruner Parts
This part replaces obsolete part #: 5038779-01, 503877901
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they are very good parts they get here fast i willl buy then again
Guest -
October 25, 2021
Verified Purchase
Exact replacement part
Pleasantly surprised as the trigger arrived sooner than expected and now the Trimmer back in working order! Almost bought a new trimmer but when I saw the part was in stock here I went for it! Thank you!
Guest -
July 7, 2021
Verified Purchase
Exact part.
Arrived quickly, and works great. Also at good price.
Guest -
April 27, 2020
Verified Purchase
Great part
Came in and it was in great condition.
Guest -
May 22, 2019
Verified Purchase
Simple repair works like new tool took a while but replacement excellent quality
Replaced part in few minutes ; weed trimmer wors like new . Thank you saved me a least 50-75$
Guest -
July 5, 2020
Verified Purchase
t
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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.
Broken throttle trigger
Donald - July 7, 2016
👍 4 of 7 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
I began by removing screws off of the cover on the handled, then removed the trigger. I replaced the trigger and put the handle back together. The hardest thing was making sure the spring stayed on. Big thanks to ereplacementparts.com for having the part in stock and getting it here quick. Thanks
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Pole saw had broken throttle trigger
George - January 8, 2023
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Parts Used
Disassembled the throttle handle
Removed broken trigger
Installed new new trigger
Reassembled the throttle handle
Removed broken trigger
Installed new new trigger
Reassembled the throttle handle
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Broken Trigger
Ralph - April 25, 2020
Tool Type
Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Replaced the trigger
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Thanks for voting and helping fellow customers!
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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.
