MOTOALL Carburetor Replacement for ECHO CS-400 CS-370 CS-400F - Walbro WT-985 Direct-Fit Kit with Spark Plug & Filters

The MOTOALL replacement carburetor is a complete OEM-fit kit designed to restore proper fuel delivery for Echo CS-370, CS-400 and CS-400F chainsaws (fits Walbro WT-985 spec).

If your chainsaw is running rough, stalling, or won’t hold a steady idle, a worn or clogged carburetor is often the cause. This MOTOALL carburetor kit includes the main carburetor plus essential installation parts so you can replace the old unit and get back to reliable starts and consistent performance. The kit is made as a direct replacement for Echo part numbers A021001921 / A021001920 and Walbro WT-985, and it’s supplied with gaskets, filters, lines, and tuning hardware to simplify the swap.

How will this carburetor improve chainsaw starting and idling?

Replacing a faulty carburetor restores correct air-fuel mixture and diaphragm operation, which helps eliminate hard starting and erratic idle. The included spark plug and air filter ensure ignition and air intake are fresh, reducing troubleshooting time after installation.

• Direct-fit design for Echo/Walbro WT-985 dimensions and mounting points
• New diaphragm and sealing gaskets prevent vacuum leaks
• Fresh air and fuel filters reduce contamination-related issues
• Includes spark plug to support better ignition from the start

What comes in the MOTOALL carburetor kit and why does it matter?

The kit arrives ready for installation: carburetor, replacement fuel filter, two gaskets, two fuel lines (black and yellow), spark plug, rubber boots, air filter, adjustment tool, grommet and an extra fuel line kit. Having all these parts on hand reduces downtime and avoids repeated small part orders while you work.

• Complete replacement carb plus accessory parts to match OEM needs
• Fuel lines and gaskets included to ensure leak-free installation
• Adjustment tool provided for post-install tuning of idle and mixture
• Spare rubber covers and grommet for secure connections and vibration resistance

Which models and serial ranges are compatible with this carburetor?

This MOTOALL unit is engineered to replace the Walbro WT-985 carburetor and fit Echo chainsaw models CS-370, CS-400, CS-400F as well as specific Shindaiwa 402S applications. Always confirm your machine’s part number and serial range before purchasing to ensure proper fit.

• Replaces Echo part numbers A021001921 and A021001920
• Meant for Echo CS-370, CS-400, CS-400F model compatibility
• Fits designated Shindaiwa 402S serial ranges where WT-985 is specified
• Check your saw’s label or service manual to match part numbers

How difficult is installation and do I need special tools?

Basic mechanical ability and common small hand tools are usually sufficient. The package includes the adjustment tool and most replacement components, but you may want a torque screwdriver, small socket set, and carburetor cleaner for the best results.

• Installation is straightforward for users comfortable with small-engine maintenance
• Use the supplied gaskets and fuel lines to avoid vacuum leaks and fuel seepage
• Fine-tune idle and mixture with the included adjustment tool after fitting
• Refer to your chainsaw manual for torque and mounting procedures

Who is this for: This MOTOALL carburetor kit is intended for homeowners, landscapers, and professional users who own Echo CS-370/CS-400/CS-400F or compatible Shindaiwa saws and need a full replacement that mirrors the Walbro WT-985 specification. It’s especially useful for anyone who wants a single package containing the carburetor plus the common consumables and small parts required for a proper, leak-free repair and immediate testing after installation.