126052-4 supersedes older part numbers: 5196019360
Genuine Makita Check Valve Assembly — part no. 126052-4
Short description:
A direct-fit replacement check valve assembly for Makita small-engine outdoor tools. Designed to sit in the carburetor / priming-pump area to control fuel / air flow and prevent backflow so the primer and carburetor operate correctly. Reliable, factory-specified part marked 126052-4 and sold as the Check Valve Assy in Makita parts diagrams.
Key details
- Part number: 126052-4.
- Function / placement: fits into the carburetor / priming pump section (shown as the Check Valve Assy near the priming pump and associated carburetor components in Makita parts diagrams). (This placement implies its role in preventing fuel / air backflow to ensure proper priming and starting.)
- Example models : Petrol Brushcutter / Line Trimmer RBC2110 , RBC201 and RST200
- Form: sold as the complete “Check Valve Assembly” matching the original Makita part number — ready to install in the carburetor assembly (order quantity = 1 where listed).
Why this part matters
If your tool’s primer bulb won’t hold pressure, or the carburetor is losing prime, a worn or blocked check valve in this location is a common cause. Replacing the 126052-4 check valve assembly restores the intended one-way action in the primer / carburetor circuit and helps the engine start and idle correctly.
What you’ll get
The original Makita-labeled check valve assembly (part 126052-4) supplied for the models listed above — a plug-and-play replacement that matches the Makita parts diagram reference so you can refit it directly to the carburetor/primer assembly.
(If your model isn’t listed here, check your tool’s parts diagram for the carburetor/primer group number to confirm part 126052-4 is the specified check valve.)
Jump straight to the Makita spare parts diagrams:
