Husqvarna 577616712 SPO012 Spool & Line – Genuine OEM Replacement Trimmer Spool
Part Number: 577616712
Category: String Trimmer, Grass Trimmer & Cutting Head Components
Type: SPO012 Single-Line Spool & Line – Genuine OEM Replacement Trimmer Spool
The Husqvarna 577616712 SPO012 Spool & Line is a genuine OEM replacement cutting-line spool designed for compatible string trimmers and grass trimmers requiring the SPO012 single-line spool configuration.
Product Specifications
- Part Number: 577616712
- Manufacturer: Husqvarna
- Product Type: Spool & Trimmer Line Assembly
- OEM Description: Spool & Line SPO012 1 Line D1
- Spool Design: SPO012
- Line Configuration: Single Line
- Trimmer Line Diameter: Approximately 1.6 mm
- Alternate Description: Trimmer Spool / Line Spool / Replacement String Trimmer Spool / Single-Line Spool
- Component Type: Trimmer Cutting Head Component
- Primary Application: String Trimmer / Grass Trimmer
- System: Trimmer Head / Cutting System
- Function: Stores and Dispenses Trimmer Line for Cutting Grass and Vegetation
- Installation Location: Trimmer Cutting Head
- Replacement Type: Direct OEM Replacement
- OEM Status: Genuine OEM Part
- Condition: New
- Quantity: 1 Spool & Line Assembly
- Part Number Reference: 577616712
- Alternate Number Format: 577 61 67-12
- EAN: 7391736017855
- Approximate Weight: 80 g
- Approximate Overall Dimensions: 115 × 130 × 47 mm
Features & Benefits
- Genuine OEM replacement spool and line
- Factory-designated SPO012 configuration
- Supplied with trimmer line installed
- Single-line cutting configuration
- Approximately 1.6 mm line diameter
- Designed for compatible string trimmer cutting heads
- Eliminates the need to manually wind a bare replacement spool
- Helps restore normal cutting-line operation
- Supports proper line storage and dispensing
- Application-specific spool dimensions and configuration
- Convenient replacement for an empty or damaged spool
- Suitable for replacing worn or malfunctioning cutting-head components
- Direct replacement for equipment specifying 577616712
- Sold as one spool and line assembly
SPO012 Spool Design
The 577616712 is specifically designated as an SPO012 replacement spool.
Husqvarna's spool lineup contains numerous configurations, including SPO001, SPO002, SPO012, SPO013, SPO018 and others. These designs should not automatically be considered interchangeable because their:
- Spool dimensions
- Line configuration
- Cutting-line diameter
- Mounting geometry
- Feed configuration
- Cutting-head compatibility
can differ.
Use SPO012 / 577616712 as the primary replacement reference.
Single-Line Configuration
The factory description identifies this spool as:
SPO012 – 1 Line D1
This means the spool is configured as a single-line cutting system, rather than a dual-line spool.
A single-line spool feeds one cutting line from the trimmer head during operation.
This configuration should not be confused with other Husqvarna spool designs that use two cutting lines.
1.6 mm Trimmer Line
Published specifications identify 577616712 SPO012 as using approximately:
1.6 mm diameter trimmer line
Correct line diameter is important because excessively thick or thin line can affect:
- Line feeding
- Cutting performance
- Spool capacity
- Engine or motor load
- Trimmer-head operation
When additional line is eventually required, follow the equipment manufacturer's line specifications.
Spool & Line Function
The 577616712 SPO012 stores cutting line inside the trimmer head and allows the line to extend outward for cutting vegetation.
A simplified arrangement is:
Trimmer Drive System → Cutting Head → SPO012 Spool → Trimmer Line → Grass / Vegetation
As the cutting head rotates, the exposed trimmer line moves at high speed and performs the actual cutting.
The spool keeps the remaining line organized inside the cutting head.
Pre-Wound Replacement
Because 577616712 is supplied as a spool and line assembly, it offers a convenient alternative to manually rewinding the existing spool.
The replacement process generally involves:
Remove Existing Spool → Install 577616712 SPO012 → Route Line Correctly → Reinstall Cutting Head Cover
This can reduce the time required to return the trimmer to service.
Trimmer Line Function
Flexible trimmer line is designed to cut vegetation through high-speed rotation.
Typical applications include:
- Grass trimming
- Lawn edging
- Trimming around trees
- Trimming around fences
- Cutting vegetation around landscaping
- Reaching areas inaccessible to lawn mowers
The line gradually wears during normal operation and eventually requires replacement.
Common Reasons for Replacement
Replacement of the 577616712 SPO012 Spool & Line may be appropriate when:
- The cutting line has been completely consumed
- The spool is cracked
- The spool is distorted
- The spool has excessive wear
- Line repeatedly jams inside the spool
- Line no longer feeds correctly
- The spool has been damaged during operation
- The spool mounting surfaces are worn
- The existing line has become tangled
- The spool has been lost during cutting-head service
- A convenient pre-wound replacement is preferred
Possible Signs of Spool Problems
A worn or damaged spool may contribute to:
- Trimmer line failing to feed
- Line repeatedly jamming
- Inconsistent line extension
- Line becoming tangled
- Excessive vibration from the cutting head
- Line breaking inside the head
- Spool failing to seat correctly
- Cutting performance becoming inconsistent
These symptoms can also originate from other cutting-head components.
Spool Inspection
Inspect the existing spool for:
- Cracks
- Distortion
- Excessive wear
- Damaged line channels
- Damaged mounting surfaces
- Debris accumulation
- Melted or heat-damaged areas
- Tangled cutting line
- Incorrectly wound line
If the spool itself is physically damaged, installing fresh line on the damaged spool may not restore proper operation.
Cutting Head Inspection
Whenever replacing 577616712, inspect the surrounding trimmer head.
Check for:
- Cracks
- Impact damage
- Excessive wear
- Dirt and grass accumulation
- Damaged retaining features
- Missing components
- Binding
- Damaged line outlet areas
A damaged cutting head can interfere with the operation of a new spool.
Line Outlet Inspection
Check the point where the trimmer line exits the cutting head.
Inspect for:
- Excessive wear
- Sharp edges
- Damage
- Debris
- Grooving
A damaged line outlet can cause premature line breakage even when a new spool is installed.
Spool vs. Trimmer Head
The 577616712 is a replacement spool and line assembly, not necessarily the complete trimmer head.
Spool & Line
Stores the cutting line and installs inside the compatible cutting head.
Complete Trimmer Head
May include the outer housing, spool, cover, retaining components, and other associated hardware.
Do not assume the complete cutting-head assembly is included unless specifically stated.
Single-Line vs. Dual-Line Spool
Trimmer spools can use different line configurations.
SPO012
Uses a single-line configuration.
Dual-Line Spool
Feeds two separate cutting-line ends from the trimmer head.
These designs should not automatically be interchanged, even if the spools appear similar.
Installation Considerations
Before replacing 577616712:
- Shut off the trimmer completely.
- Disconnect the spark plug or power source as appropriate.
- Allow the cutting head to stop completely.
- Place the trimmer on a stable work surface.
- Clean grass and debris from around the cutting head.
- Remove the applicable spool cover or retaining component.
- Carefully remove the existing spool.
- Note the original spool orientation.
- Inspect the cutting-head housing.
- Clean accumulated grass and debris as appropriate.
- Inspect the line outlet.
- Compare the replacement spool with the original.
- Install the 577616712 SPO012 Spool & Line in the correct orientation.
- Route the cutting line through the applicable outlet.
- Make sure the spool seats completely.
- Reinstall the spool cover or retaining component.
- Verify that the cutting head is securely assembled.
- Rotate or test the spool manually where appropriate.
- Reconnect the equipment's power source.
- Test trimmer operation in a clear, controlled area.
Installation Tips
During installation:
- Disconnect the equipment from its power source before servicing
- Clean the cutting head before opening it
- Note the original spool orientation
- Remove accumulated grass and debris
- Verify the replacement is SPO012 / 577616712
- Route the line through the correct outlet
- Avoid pinching the line during assembly
- Make sure the spool sits completely inside the cutting head
- Reinstall the spool cover securely
- Verify that all cutting-head components are locked in place
- Keep hands clear of the cutting line when testing the trimmer
Maintaining Proper Line Feed
To support reliable line feeding:
- Keep the spool correctly seated
- Avoid overfilling the spool if rewinding is permitted
- Use the specified line diameter
- Keep the cutting head clean
- Remove tangled line
- Inspect the spool for cracks
- Check line outlets for excessive wear
- Avoid installing incompatible line sizes
- Replace damaged spool components promptly
Correct spool installation is particularly important because the line must be able to unwind without binding.
Maintenance Tips
To help maintain reliable trimmer operation:
- Inspect the cutting head regularly
- Remove accumulated grass and debris
- Check the spool for cracking or distortion
- Replace worn cutting line as necessary
- Use the correct line diameter
- Inspect the line outlet for damage
- Check the spool cover and retainers
- Investigate repeated line-feed problems
- Replace damaged cutting-head components
- Disconnect the equipment before servicing the cutting head
Important Notes
- Verify compatibility with your exact trimmer model, product number, and production revision before ordering.
- Match part number 577616712 directly with the applicable OEM parts documentation.
- 577616712 is identified as “Spool & Line SPO012 1 Line D1.”
- The SPO012 uses a single-line configuration.
- Published specifications identify the cutting line as approximately 1.6 mm diameter.
- The published EAN for 577616712 is 7391736017855.
- The spool and line assembly has a published approximate weight of 80 g.
- This component provides both the replacement spool and cutting line.
- Do not confuse SPO012 with SPO013, SPO017, SPO018, or other spool configurations.
- Do not assume every Husqvarna trimmer uses 577616712.
- Do not select a replacement spool solely by approximate diameter or visual similarity.
- Spool dimensions, line diameter, feed configuration, mounting geometry, and cutting-head compatibility must match.
- Use 577616712 / SPO012 as the primary fitment reference.
- Inspect the cutting-head housing whenever replacing the spool.
- Remove grass and debris from the cutting head before installation.
- Verify that the cutting line is routed correctly through the applicable outlet.
- Make sure the spool and cover are completely secured before operation.
- Do not cut, drill, grind, reshape, or otherwise modify the replacement spool to force fitment.
- Disconnect the spark plug, battery, or electrical power source as appropriate before servicing the cutting head.
- Allow the trimmer head to stop completely before handling the spool or cutting line.
- This listing is for one Husqvarna 577616712 SPO012 Spool & Line assembly only unless otherwise specified. Complete trimmer head, outer housing, spool cover, retainers, and other cutting-head components are sold separately unless explicitly included.
- Match Husqvarna 577616712 with your equipment's OEM parts documentation before ordering to ensure proper fitment.
