Deutz FL511 Control Spring 0223 3965 | China Maker for Fuel System Overhaul

We produce the Deutz FL511 control spring (OEM reference 0223 3965) at our China facility, supplying directly to diesel repair workshops and fuel system overhaul specialists worldwide. This spring is a critical component within the governor assembly of the FL511 air-cooled engine, responsible for maintaining stable engine speed by regulating fuel delivery under varying load conditions. Unlike general spring suppliers, we manufacture to Deutz original specifications—controlling wire diameter, coil count, free length, and heat treatment parameters to ensure consistent spring rate and fatigue resistance. Our factory-direct model means you receive these precision springs at wholesale pricing, with batch-level material traceability and the technical documentation to support your rebuild operations.