Propeller Shaft Set OS74004039 for O.S. Engine (fits OMA-3810, OMA-3805)  [OS74004039]

Replacement propeller shaft compatible with OMA-3810/OMA-3805

This propeller shaft set carries the designation OS74004039 by O.S. Engine and is intended for models that reference OMA-3810 and OMA-3805. It provides a direct replacement for the rotating shaft used within compatible brushless motor assemblies and related driveline couplings.

Installation notes: work on a level bench, remove any motor or transmission covers as your chassis requires, confirm shaft alignment and bearing clearance before finishing assembly, and tighten fasteners to the chassis maker's advised torque. The item is intended to replace bent or fatigued shafts to recover concentricity and reduce endplay.

Tuning and maintenance role: changing this shaft is part of scheduled maintenance to limit vibration and preserve rotational alignment, helping to retain expected motor response during setup and running. Always inspect adjoining bearings and couplers to ensure correct mating and fit.