Amazon.com: SRM 225 Trimmer Head for Echo Speed-Feed 400 Bump Trimmer Head Wear Cap Spool Cover and Trimmer Head Spring Replace SRM210 SRM210SB SRM211 SRM211SB SRM225SB SRM260SB String Trimmer (Updated) : Patio,
How to Rebuild the Carburetor on an Echo Trimmer (Model SRM-225) : eReplacementParts.com
Echo SRM-225 Carburetor A021001692 OEM | Echo Parts