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

Replacement diaphragm pump for small RC engines

The Zenoah K261881260 diaphragm pump is a direct replacement for Zenoah G450PU and G620PU engine models used in RC applications. It moves fuel through the engine's fuel system and is provided without retail packing.

Use this pump to address fuel delivery faults, replace a degraded diaphragm, or return consistent priming performance. The unit features a nylon diaphragm as its primary material and is intended for model engine maintenance rather than use in full size equipment.

Installation notes: drain remaining fuel and vent the tank before replacing the pump, align mounting holes and fuel fittings with the engine, and verify sealing surfaces and O rings are clean and seated. After fitting, run the engine at idle and part throttle to check for any leaks and correct seating.

Tuning and maintenance impact: the pump itself does not change engine timing, but consistent fuel flow supports steady throttle response and ignition reliability. Inspect the diaphragm periodically for tears, hardening, or debris to prolong service life and avoid drivability issues on the model.