Echo X472000070 Bump Knob OEM Part

Product Details

Genuine Echo part. See all items in Edger Trimmer Head, Hedge Trimmer Trimmer Head and String Trimmer Trimmer Head.

Cross Reference Information

Part Number X472000070 replaces AP6169505, 3319838.

Description

This is a black plastic bump knob for the end of Echo string trimmers. A bump knob is a simple piece of plastic that covers the end of the spool. When knocked against the ground, it triggers the release of more string. Its durability will depend entirely on how it’s used. In practice, it will last until it’s been worn out or cracked. It will last longer when bumped primarily on grass as opposed to when it’s bumped primarily on concrete or asphalt. A bump knob will need to be replaced when it’s too worn out to work correctly. In this case, remove the collar from the string trimmer’s upper case. Remove the old bump knob, replace it with the new knob, and reassemble the trimmer. The entire process should take less than five minutes. In addition to Echo machines, this bump knob has also been used on some Shindaiwa string trimmer models. This is an OEM part sourced directly from Echo, and it is sold individually.