Medium
15-30 minutes
Spring 90550451
OEM part for: Black and Decker
Part Number: 90550451
$3.99
In Stock
Ships within 1 business day 
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Compatibility
This part will fit the following 8 machines
Black and Decker
LST136 36V String Trimmer View Diagrams & Manuals
98020SE (Type 1) Lst136 - 40v String Trimm View Diagrams & Manuals
LST136B (Type 2) 40v Lith Str Trimmer View Diagrams & Manuals
LST540 (Type 1) 40v Brushless String View Diagrams & Manuals
LST540B (Type 1) 40v Brushless String View Diagrams & Manuals
LST560C (Type 1) 60v Easyfeed Trimm View Diagrams & Manuals
LST136 (Type 1) Cordless String Trimmer Power Tool View Diagrams & Manuals
LST136 (Type 2) Cordless String Trimmer Power Tool View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Trimmer Parts
Customer Part Reviews ?
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Weed wacker replacement part
I found all the parts I needed to replace all my broken parts on my weed wacker. They work great and I was up and wacking. Order was shipped quick and received in 2 days.
Guest -
June 29, 2023
Verified Purchase
your shipping is fast have order several parts they all fit just like new great to do deal with
fast shipping part fit great
john -
August 18, 2020
Verified Purchase
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Questions & Answers ?
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Does this fit my product?Questions & Answers for Spring
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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.
string trimmer gears wear out and excessive heat melts the parts together
Michael - August 6, 2019
Tool Type
Grass Trimmer
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Replaced motor housing, trimmer head, spring etc to total recondition trimmer that otherwise runs flawlessly
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head gears were worn out and head was loose
Joe - October 12, 2018
Tool Type
Grass Trimmer
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Removed the battery
Removed the guard
Removed the metal piece in front of guard
Removed screws holding the head together
Separated head
Remove the old worn out geared mechanism
Put in new mechanism
Replace spring on latch controlling rotation of the head
Replace cover
Replace screws
Replace guard
Replace metal guard
Removed the guard
Removed the metal piece in front of guard
Removed screws holding the head together
Separated head
Remove the old worn out geared mechanism
Put in new mechanism
Replace spring on latch controlling rotation of the head
Replace cover
Replace screws
Replace guard
Replace metal guard
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Thanks for voting and helping fellow customers!
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
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.
