Echo CS400 - Tuning and chain adjustment - YouTube
Echo CS 400 Chainsaw Review - YouTube
Amazon.com: Chainsaw Parts (New) P021048060 Echo Chainsaw Sprocket Guard Set CS-370 CS-400 + All Other Models in The Description : Patio, Lawn & Garden
Echo CS 400 Chain 91PX57CQ 16 in | Echo Parts
Amazon.com: LIJIANG Chain Bar Tensioner Adjuster Assembly Replacement for Echo CS-400 CS400 CS-450 Chainsaws : Patio, Lawn & Garden
91VXL62CQ replacement Pro 18" saw chain for Echo CS-400, CS-400F | Loggerchain - Frawleys Saw Shop