Medium
15-30 minutes
This is an authentic Husqvarna replacement part that has been sourced from the original manufacturer to be used with chainsaws. The metal spring is part of the rear handle and is used to provide tension on the trigger to keep the trigger pressed outward. This item is available as an individual replacement part.
Spring 503998601
OEM part for: Husqvarna
Part Number: 503998601
$9.96
In Stock
Ships within 1 business day 
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Compatibility
This Spring will fit the following 165 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 165 matching models.
Husqvarna
Show More Compatible Models165 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Husqvarna
- Jonsered
This item works with the following types of products:
- Chain Saw
- Saw
Customer Part Reviews ?
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Easy to find the part I needed!
Guest -
December 25, 2020
Verified Purchase
right part recieved but took long time to be delivered.
faster delivery would be great!
Guest -
June 12, 2020
Verified Purchase
Fits . Works .
Fits . Works .
Shipping sucks ass
Takes to long to receive parts .
Guest -
October 25, 2019
Verified Purchase
easy repair with the right part fast service
makes my customer happy with the quick turn around
wayne -
August 18, 2019
Verified Purchase
Good service right parts thanks
Good service right parts thanks
Richard -
May 4, 2019
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.
All parts of trigger were missing.
Kurt - May 8, 2022
👍 1 of 1 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Medium
Time
15-30 minutes
Tools Used
, Small hammer
First snap the trigger into place and use a small hammer to drive the pin in. It took me the most time to figure out how the spring goes in. The end with the circular part pushes into the hollow in the back of the trigger. After that, the long trigger lock just gets pushed down into the handle until it snaps in. I had nothing to go on but, it was easy once I figured it out.
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Broken saw handle and worn spring
jack - April 7, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Medium
Time
15-30 minutes
Tools Used
, Allen wrenches
Parts Used
Remove the screws from the handle, remove the handle
Make note how the spring is positioned in the handle
Install the new spring and the new handle
Make note how the spring is positioned in the handle
Install the new spring and the new handle
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Throttle lock broke off.
RONALD - August 12, 2018
Tool Type
Chain Saw
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Allen wrench set
Parts Used
Had to remove the air chamber housing and remove the grip bar so I could get room to remove the throttle lock.
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Trigger broke and missing spring
robert - March 29, 2017
Tool Type
Chain Saw
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Took the pin off, position the spring and replace the trigger, placed the the spring in the right slot and slid it into proper position.
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The handle was broken along with the throttle mehanism
Randall - March 2, 2017
Tool Type
Chain Saw
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Nutdriver, Allen keys
Removed the old handle half that was left and the right side that is attached to the upper handle . Removed the torsion mount springs and the air filter housing . Transferred all the necessary parts then installed the new right half with the upper handle and then the throttle lock and trigger with the return spring which was slightly confusing when the old parts were missing so I used the parts breakdown from e replacement for the placement and finished assembling the rest and the repair was successful thank you, all the part were right the first time around
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Trigger was broke.
Jonathan - December 1, 2016
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Removed the old trigger,throttle lock and spring.
Cleaned out the broken pieces of trigger.(most of it was where the pin holds the trigger in place)
Reassembled the new trigger with the new lock and spring.
I used the old pin.
I tried to keep all the old parts connected to see how they went together.
Cleaned out the broken pieces of trigger.(most of it was where the pin holds the trigger in place)
Reassembled the new trigger with the new lock and spring.
I used the old pin.
I tried to keep all the old parts connected to see how they went together.
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Broken trigger and throttle lock on chainsaw
Gene - June 18, 2016
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pin punch
I used a pin punch to remove the broken trigger.
Replaced the broken trigger and the spring and the throttle lock.
Installed the missing screw.
Installed the new decals.
Replaced the broken trigger and the spring and the throttle lock.
Installed the missing screw.
Installed the new decals.
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Learn MoreOur 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.
