KH866 Chainsaw Oil Cap with Retainer Spring – OEM Replacement for Echo CS310/CS330T/CS352/CS355T/360T

Overview

Replace a worn oil cap with the KH866 oil cap assembly, a genuine OEM part designed to fit select Echo chainsaws and compatible Shindaiwa models. This replacement helps maintain proper oil sealing and consistent lubrication during routine maintenance, offering a dependable upgrade without altering your workflow.

This kit centers on a durable retainer spring that helps keep the cap secure during use, reducing the chances of chatter or looseness when the chain is under pressure. The assembly is built to resist everyday wear, contributing to smoother operation over time while you focus on the task at hand.

Key benefits

• Genuine OEM quality that meets original equipment standards
• Wide compatibility with Echo models and compatibility notes for Shindaiwa
• Retainer spring design for a secure, consistent seal
• Includes an O-ring to aid sealing, though the O-ring is not pre-installed
• Clear part numbers to aid quick identification: P021005581 and P021037920
• Durable construction that stands up to routine maintenance tasks

What’s included

• 1 x oil cap assembly with retainer
• 1 x O-ring (not pre-installed)

Compatibility

Designed for Echo CS310, CS330T, CS352, CS355T, CS360T and also compatible with Shindaiwa chainsaws. Always verify part numbers and model compatibility before purchase to ensure a proper fit.

Installation tips

• Check your part number and model before buying to confirm compatibility
• To minimize damage, open with an oil cap wrench or wrap soft cloth around adjustable pliers
• Avoid overtightening; hand-tighten and snug only as needed for a secure seal
• Note that the O-ring is included but not pre-installed—place it during the final assembly
• If you need help, contact us for guidance during installation

Why choose KH866

Choosing a genuine OEM replacement can help preserve the original performance of your chainsaw, with focused design to fit the listed Echo models and related equipment. This part line aims to support steady operation and straightforward maintenance routines.