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The ECHO P021005581 is a genuine OEM oil cap assembly with retainer, designed to seal the bar and chain oil reservoir on ECHO chainsaw models. This replacement cap maintains a proper seal to prevent leakage during operation and keeps debris out of the oil tank. Constructed from metal, the assembly includes the retainer to keep the cap tethered to the saw body, reducing the risk of losing it in the field. Licensed ECHO service technicians and small-engine repair shops typically stock this cap as a routine service component for chainsaw maintenance and repair calls.
This oil cap assembly is a direct OEM replacement intended for use on ECHO chainsaws requiring part number P021005581. Compatible models listed in the source data include CS271T, CS310, CS330MX4, CS330T, CS360T, CS352, CS355T, and CS361P. Consult the owner's manual or ECHO's part lookup tool to confirm fitment for a specific unit before ordering.
Confirmed compatible with the following ECHO chainsaw models: CS271T, CS310, CS330MX4, CS330T, CS360T, CS352, CS355T, and CS361P. Always verify by cross-referencing the unit's model and serial number against the ECHO OEM parts diagram before installation.
Installation is typically performed by small-engine technicians or qualified chainsaw service personnel. Before replacing the oil cap, power down the saw, allow the engine to cool completely, and wipe the area around the oil reservoir clean to prevent contamination. Ensure the retainer clip is properly seated after installation to avoid cap loss during operation. Consult the ECHO owner's manual for model-specific service procedures.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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