Original Makita pump diaphragm — part no. 5426003060 — a flexible membrane used in the carburetor pump assembly of Makita brushcutters.

Fits Makita models in the RBC525 / RBC525G and RBC525E in Makita parts breakdowns, where it sits under the pump cover and works with the valve plate and pump gasket to move fuel through the carburetor.

This is the original Makita replacement membrane sold as a single part (“pump diaphragm” / “membrane”), so you get the exact shape and fit required for the pump chamber and its mating cover. Makita parts are referenced in the parts diagrams for straightforward installation.

Ideal when the diaphragm shows cracks, hardening, or loss of sealing — replace the part number 5426003060 to restore proper carburetor pump action and reliable starting / performance.