Embla EB 28T Counter Gear & 14T Pulley Replacement - HI0304130 HIROBO  [HI0304130]

Embla EB drive counter gear with 14-tooth pulley

Marked HIROBO HI0304130, this counter gear unit is intended for use in Embla EB-series RC helicopters. The assembly joins a 28-tooth counter gear to a 14-tooth pulley to pass rotation through the transmission system and replaces worn original parts.

Functionally, the part sets gear mesh and maintains rotational relationship while the pulley guides the power path. During installation, confirm shaft alignment and that mating gears spin freely, check mesh for correct clearance without binding, and ensure the pulley is fully seated prior to final tightening.

For tuning, adjust mesh gradually and perform low-power spin checks to validate smooth engagement before flight. This method reduces risk of premature wear and minimises unwanted noise and backlash in the drivetrain.