GreenWorks STF306 User Manual (English)

Questions and Answers:

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Margaret RandallAug 4, 2025
What to do if my GreenWorks STF306 Trimmer stops when I cut?
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  Samantha HayesAug 4, 2025
  If your GreenWorks Trimmer stops while cutting, here are a few potential reasons and solutions: * Ensure the guard is properly attached. * Verify you're using the correct nylon cutting line (1.65 mm diameter). * Check for and remove any grass wrapped around the motor shaft or trimmer head. * Avoid overloading the motor by moving the trimmer head in and out of the grass, removing no more than 8" per pass. If overloaded, remove the trimmer head from the grass to allow the motor to recover. * Allow the battery pack or machine to cool down if they are too hot. * Make sure the battery pack is correctly installed and charged.
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michaelsweeneyAug 9, 2025
Why does the line keep breaking on my GreenWorks STF306?
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  Phillip CabreraAug 9, 2025
  If the line on your GreenWorks Trimmer keeps breaking, it could be due to incorrect usage or insufficient line advancement. Try these solutions: * Cut with the tip of the line, avoiding stones, walls, and other hard objects. * Advance the cutting line regularly to maintain a full cutting width.
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Michelle CampbellAug 14, 2025
What to do if the line does not advance on my GreenWorks STF306 Trimmer?
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  Joshua MillerAug 14, 2025
  If the line on your GreenWorks Trimmer isn't advancing, consider the following: * Lubricate the lines with silicone spray if they are welded together. * Install more line if the spool is running low. * Advance the cutting line if the lines are worn too short. * Remove and rewind the lines if they are tangled on the spool.
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Tina GonzalezAug 18, 2025
Why does grass wind around the trimmer head of my GreenWorks STF306 Trimmer?
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  michael69Aug 19, 2025
  If grass is winding around the trimmer head and motor housing of your GreenWorks Trimmer, it's likely due to cutting tall grass incorrectly. Here's how to prevent it: * Cut tall grass from the top down. * Remove no more than 8" in each pass.
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whitney16Aug 25, 2025
How to fix increased vibration in my GreenWorks Trimmer?
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  robertbellAug 25, 2025
  If the vibration of your GreenWorks Trimmer increases noticeably, it might be because the line is worn down unevenly. Ensure the line on both sides is normal and advance the line as needed.
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Marcus MillerAug 29, 2025
What to do if my GreenWorks Trimmer line does not cut well?
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  Tiffany PachecoAug 29, 2025
  If the line on your GreenWorks Trimmer isn't cutting well, the cut-off blade may be dull. Sharpen the cut-off blade with a file or replace it.

GreenWorks STF306 Specifications

General

Type	String Trimmer
Power Source	Battery
Voltage	40V
Line Diameter	0.065 inches
Adjustable Handle	Yes
Battery Included	Yes
Battery Type	Lithium-Ion
Battery Runtime	Up to 45 minutes
Charging Time	120 minutes
Warranty	4 years
Cutting Width	12 inches
Cutting Path	12 inches