How To Repair An Echo CS590 or CS620 With A Scored Or Seized Piston And Low Compression
This video shows how to repair an Echo CS-590, CS-620, or similar, chainsaw that has a scored piston and stuck piston ring, either from being run on straight gas, or from being run lean and hot, without replacing the piston and cylinder. This is not the professional or correct way of repairing a saw with this type of damage; it's just a demonstration of what's possible.

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