HIROBO HI0304130 Embla EB counter gear 28T with 14T pulley  [HI0304130]

Embla EB counter gear with 14T pulley

This is an RC-scale counter gear assembly listed as HIROBO HI0304130, specified for Embla EB-series models. The unit pairs a 28-tooth counter gear with a 14-tooth pulley to transfer rotation inside the model's drivetrain, serving as a direct replacement component when the original gear or pulley shows wear.

The description focuses on its role in power transfer and tuning: the counter gear sets gear mesh and rotational relationship while the pulley interfaces with the transmission path. When installing, confirm alignment and free rotation of mating gears, check for proper mesh without binding, and verify pulley seating before final tightening.

For setup and tuning, use incremental adjustments to gear mesh and recheck rotation under low-power spin before flight. This helps prevent premature wear and keeps transmission noise and backlash within acceptable ranges for RC helicopter operation.