![Echo SRM-225. Is this air knob? What would I ever need to adjust it for? Manual doesn't even acknowledge it. Not sure if I need it tight when stored and loose when Echo SRM-225. Is this air knob? What would I ever need to adjust it for? Manual doesn't even acknowledge it. Not sure if I need it tight when stored and loose when](https://preview.redd.it/n9nmhqfocr831.jpg?width=640&crop=smart&auto=webp&s=2b8acc1fafdce587d67e53481586a3b2407bed5f)
Echo SRM-225. Is this air knob? What would I ever need to adjust it for? Manual doesn't even acknowledge it. Not sure if I need it tight when stored and loose when
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Amazon.com: Welironly New OEM Zama RB-K93 Carburetor Carb for Echo SRM-225 SRM-225i String Trimmer,#id(theropshop; TRYK32271418650738 : Patio, Lawn & Garden
![GENUINE ECHO SRM-225 TRIMMER INTAKE MANIFOLD BLOCK A200001120 – www.SawSalvage.co Traverse Creek Inc. GENUINE ECHO SRM-225 TRIMMER INTAKE MANIFOLD BLOCK A200001120 – www.SawSalvage.co Traverse Creek Inc.](https://cdn.shopify.com/s/files/1/0312/7533/products/1_e2e537dc-34c5-4b7c-b6a7-1a0546759ab0_1024x1024.jpg?v=1642521600)