Zenoah K261881260 Diaphragm Pump for G450PU/G620PU (without packing)  [K261881260]

Diaphragm pump spare for small RC engines

The Zenoah K261881260 diaphragm pump is a direct replacement component intended for use on Zenoah G450PU and G620PU model engines in RC applications. It serves the simple, technical role of moving fuel within the engine's fuel system and is supplied without additional packing.

Use this pump when servicing fuel delivery issues, replacing a worn or damaged diaphragm, or restoring consistent priming. The part includes a nylon diaphragm as the key material attribute and is intended for model-scale engine maintenance rather than any full-size machinery.

Installation notes: remove residual fuel and vent the tank before replacing the pump, match mounting holes and fuel line fittings to the engine, and ensure sealing surfaces and O-rings are clean and correctly seated. After installation, check for leaks at idle and under throttle to confirm a correct fit.

Tuning and maintenance role: while the pump itself does not alter engine tuning directly, a properly functioning diaphragm pump ensures steady fuel flow which supports consistent throttle response and ignition behavior. Regular inspection for tears, hardening, or debris will extend service life and reduce drivability issues on the model.