- This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
- New stock is on the way! On order parts usually ship within 7 business days.
- Item is not in stock and usually ships 10-15 business days from the time you place your order.
- This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Frequently Purchased Together
?Troubleshooting
This part works with the following brands:
- Husqvarna
This part works with the following products:
- Chainsaw
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Customer Part Reviews
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Ralph Harbison
Fits perfectly. I would definitely order from Replacement zparts again when needing a part! Thank you
Guest - April 14, 2021
Verified Purchase
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.
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Trigger was broke.
Jonathan from Middletown , Ohio
2 of 2 people
found this instruction helpful.
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Pliers, Screw drivers
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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All parts of trigger were missing.
Kurt from Woodburn, Oregon
1 person
found this instruction helpful.
- Difficulty Level:
- A Bit Difficult
- Total Repair Time:
- 15 - 30 mins
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
... Read more
, it was easy once I figured it out.
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Throttle lock was broken in half
Charles from Syracuse, New York
1 person
found this instruction helpful.
- Difficulty Level:
- Easy
- Total Repair Time:
- Less than 15 mins
- Tools:
- Screw drivers
- Parts Used:
- 503854401
Use a screwdriver to wedge out the old one and snap the new one in. You do not have to take apart anything.
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Broken trigger and throttle lock on chainsaw
Gene from Rustburg, Virginia
1 person
found this instruction helpful.
- Difficulty Level:
- Easy
- Total Repair Time:
- 15 - 30 mins
- Tools:
- Screw drivers
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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Throttle lock broke off.
RONALD from PUEBLO, Colorado
0 of 1 people
found this instruction helpful.
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Model Cross Reference
This part works with the following models:
ERP Number: ERP8990814
Manufacturer Part Number: 503854401
Manufacturer Part Number: 503854401
| Brand | Model Number | Description |
|---|---|---|
| Husqvarna | 253RB | Brush Cutter - 253 Rb (20101000001-20182200000) |
| Husqvarna | 340 | Chainsaw - 340 (20051800001-20062300000) |
| Husqvarna | 340E | Chainsaw - 340 E (20051800001-20062300000) |
| Husqvarna | 340EPA | Chainsaw - Chainsaw |
| Husqvarna | 345 | Chainsaw - 345, 19993600001-20013500000 |
| Husqvarna | 345E | Chainsaw - 345 E Triobrake, 20083600001-Current |
| Husqvarna | 345EPA | Chainsaw - Chainsaw |
| Husqvarna | 345ETRIOBRAKE | Chainsaw - Chain Saw |
| Husqvarna | 346 | Chainsaw - Chainsaw |
| Husqvarna | 346XP | Chainsaw - Chainsaw |
| Husqvarna | 346XPEPA | Chainsaw - Husqvarna Chainsaw Model 346XPEPA Parts |
| Husqvarna | 346XPTRIOBRAKE | Chainsaw - Husqvarna Chainsaw Model 346XPTRIOBRAKE/2008-09 (346XPTRIOBRAKE/200809, 346XPTRIOBRAKE/2008 09) Parts |
| Husqvarna | 350 | Chainsaw - Chainsaw |
| Husqvarna | 350EPA | Chainsaw - Chainsaw |
| Husqvarna | 351 | Chainsaw - Chainsaw |
| Husqvarna | 351EPA | Chainsaw - Chainsaw |
| Husqvarna | 353 | Chainsaw - Chainsaw |
| Husqvarna | 353-353G | Chainsaw - 353 / 353g / 353e-Tech / 353g E-Tech |
| Husqvarna | 353EPA | Chainsaw - Chainsaw |
| Husqvarna | 353EPAI | Chainsaw - Husqvarna Chainsaw Model 353EPAI Parts |
| Husqvarna | 353TRIOBRAKE | Chainsaw - Chain Saw |
| Husqvarna | 357 | Chainsaw - Chainsaw |
| Husqvarna | 357EPA | Chainsaw - Chainsaw |
| Husqvarna | 357XP | Chainsaw - Chainsaw |
| Husqvarna | 357XPEPA | Chainsaw - Chainsaw |
| Husqvarna | 357XPEPAI | Chainsaw - Chainsaw |
| Husqvarna | 359 | Chainsaw - Chainsaw |
| Husqvarna | 359EPA | Chainsaw - Chainsaw |
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
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