Operator's Manual for Husqvarna 129C, 129L, 129LK Grass Trimmer
Quick guide for the Husqvarna 129C, 129L, and 129LK grass trimmers. Includes assembly, starting procedures, maintenance, and technical specifications.
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This manual provides essential instructions for the safe operation and maintenance of the Husqvarna 129C, 129L, and 129LK grass trimmers. Always ensure the product is fully assembled before use and that you are at least 15 meters away from other people or animals. Use a 50:1 fuel mixture (2% oil) and ensure the cutting attachment is correctly installed.
Overview of the product
The trimmer consists of several key components, including the trimmer head, shaft, loop handle, throttle trigger, stop switch, fuel tank, and air filter cover. Refer to the product diagrams for specific locations of these parts.

Assembly



Attaching the loop handle
Attach the loop handle to the shaft as shown in the manual and tighten securely. Ensure it is positioned between the arrows on the shaft.
Assembling the two-piece shaft
Loosen the shaft coupling knob, align the tab on the shaft with the arrow on the coupling, push the shaft in until it clicks, and tighten the knob securely before use.
Assembling the cutting attachment
For straight shafts, attach the guard with the bolt, install the drive disc, lock the shaft with a small screwdriver, and tighten the trimmer head counterclockwise. For curved shafts, attach the guard, dust cup, and tighten the trimmer head clockwise.
Operation

Fueling
Use a mixture of gasoline and two-cycle engine oil at a 50:1 (2%) ratio. Do not use gasoline with an octane rating lower than 90 RON (87 AKI) or more than 10% ethanol. Always mix in a clean container and do not prepare more than a 30-day supply.
Starting the engine
For a cold engine: Press the primer bulb 10 times, pull the choke control up, hold the product on the ground, and pull the starter rope until it starts. Once started, push the choke down and let the engine warm up for 60 seconds. For a warm engine: Press the primer bulb 10 times and pull the starter rope until it starts.
Maintenance
Follow the maintenance schedule provided in the manual. Weekly tasks include cleaning external surfaces and checking idle speed. Yearly tasks include checking the spark plug, cleaning the carburetor, and cleaning the cooling system. Adjust the idle speed using the T-screw so that the cutting attachment does not rotate at idle.
Safety
Always wear appropriate personal protective equipment, including eye protection, hearing protection, and sturdy boots. Do not operate the product if you are fatigued or under the influence of alcohol or drugs. Keep the product away from flammable materials and do not refuel while the engine is running.
Manufacturer information
Husqvarna
Practical help
Common problems
Check spark plug, air filter, and fuel mixture.
Check spark plug, air filter, and fuel mixture.
Adjust idle speed screw (T) counterclockwise until it stops.
Before use
- Check for missing, damaged, loose, or worn parts
- Check nuts, screws, and bolts
- Check air filter
- Check throttle trigger lockout and throttle control
- Check stop switch
- Check for fuel leaks
Specs in practice
- Cylinder displacement
- 27.6 cm³
- Fuel tank volume
- 343 cm³
- Idling speed
- 2800-3200 min⁻¹
Images and diagrams
- Fig 1: Overview of components
- Fig 20: Throttle trigger lockout
- Fig 23-24: Loop handle assembly
- Fig 25-29: Two-piece shaft assembly/disassembly
- Fig 30-31: Cutting attachment assembly
Model compatibility
- 129LK supports optional attachments like sweeper, hedge trimmer, edger, etc.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.