SPERTEK Chainsaw Clutch Drum Assembly for Echo CS-310 — 3/8" Pitch 6-Tooth with Preinstalled Bearing

SPERTEK's 3/8" pitch, 6-tooth clutch drum assembly is a direct-fit replacement for Echo CS-310 models, supplied complete with bearing for fast, reliable installation.

If your Echo CS-310 chainsaw has worn clutch components, this SPERTEK clutch drum assembly restores the interface between the engine and the chain drive. Manufactured to match the OEM dimensions referenced by Echo part numbers A556-000541, A556-000542 and A556-000543, the unit includes a preinstalled bearing to reduce friction and simplify fitment. The drum accepts standard 3/8" pitch chains and uses six teeth to engage the sprocket, making it suitable for routine maintenance or repair work on compatible saws.

Will this clutch drum fit my Echo CS-310?

Yes — this assembly is engineered as a direct replacement for Echo CS-310 machines that use the specified OEM part numbers. Verify your saw’s model and existing part number before ordering to ensure compatibility.

• Designed to replace Echo A556-000541, A556-000542, A556-000543
• Confirmed fit for Echo CS-310 model
• 3/8" pitch and 6-tooth configuration matches original specifications

What comes included and how does the bearing help?

The SPERTEK clutch drum ships with the bearing already installed, so you get a ready-to-install component. The bearing cuts down rotational friction and helps the drum spin smoothly under load, improving drivetrain responsiveness.

• Preinstalled bearing reduces assembly steps
• Lower rotational friction for smoother engagement
• Single-piece drum with integrated bearing for straightforward replacement

How do I install this clutch drum on my saw?

Installation follows standard clutch/drum replacement procedures: remove the old drum and clutch, inspect the surrounding components, slide the new drum into place, and reassemble per the manufacturer’s torque and clearance specs. If you’re unsure, have a qualified technician perform the replacement.

• Remove bar, chain and clutch cover first
• Replace drum and bearing as a matched unit to preserve alignment
• Check sprocket, chain tension, and clutch engagement after installation

What technical specs should I confirm before buying?

Confirm the chain pitch and tooth count of your original drum and compare it to this unit’s specs. This SPERTEK drum is specified for 3/8" pitch chains with six teeth, matching the stated Echo OEM items.

• Pitch: 3/8"
• Tooth count: 6
• Replacement OEM references: Echo A556-000541/542/543

Who is this for: This SPERTEK clutch drum assembly is intended for homeowners, arborists, landscapers, and small engine repair shops who need a reliable, drop-in replacement for the Echo CS-310 clutch drum. It’s ideal if you want an affordable aftermarket part that meets OEM fitment references and arrives with the bearing preinstalled to speed up maintenance and reduce downtime. Contact us with your model and serial details if you need help confirming fitment or have installation questions.