Embla EB Drive Counter Gear 28T + 14T Pulley - HI0304130 by HIROBO  [HI0304130]

Counter gear and pulley for Embla EB helicopters

Sold under the reference HIROBO HI0304130, this counter gear assembly fits Embla EB-series models. It combines a 28-tooth counter gear with a 14-tooth pulley to move rotation through the model's drivetrain and functions as a direct replacement for worn components.

The assembly is responsible for transmitting torque and defining gear mesh: the counter gear governs rotational timing while the pulley couples into the transmission route. On assembly, ensure gears are aligned and rotate freely, set mesh to avoid binding, and confirm the pulley is seated and secure before final tightening.

When configuring the drivetrain, make iterative mesh adjustments and run a low-power spin test to confirm smooth operation prior to flight. This practice helps limit premature tooth wear and keeps transmission noise and backlash within acceptable limits.