Husqvarna Trimmer Bump Knob and Spring

No, this specific kit is designed exclusively for the T25 trimmer head. Please verify that your trimmer is equipped with a T25 head before purchasing, as it will not fit other Husqvarna models.

The bump-feed mechanism relies on the spring tension and the integrity of the knob to advance the line properly. If your trimmer stops feeding line when you tap it, replacing these two worn components is often enough to restore full functionality without the expense of a complete head assembly.

This is a genuine OEM replacement part manufactured by Husqvarna. It is designed to meet the exact specifications and material standards of the original component that came with your trimmer.

Generally, no specialized tools are required. You can typically remove the old knob and spring by hand or with a simple screwdriver, depending on the specific wear of your current head, and snap the new components into place.

If you are tapping the trimmer head on the ground and the line is not advancing, or if the knob feels loose, cracked, or lacks spring tension, the mechanism is likely failing. Inspecting the spring for rust or compression loss and checking the knob for worn-down plastic or metal contact points will confirm if a replacement is necessary.