21XM Compatible 42mm Propeller - O.S. Engine OS23870000  [OS23870000]

42mm Propeller Suitable for 21XM Boats

This 42mm marine propeller is provided as a scaled RC spare for use with 21XM-designated models. The item is the prop only, not a complete drive unit, and is intended for hobby marine craft.

Compatibility is tied to the "for 21XM" designation in the product name; ensure your hull requires a 42mm prop before fitting. Installation generally needs the proper prop adapter and securing nut already fitted to the shaft; confirm fit and thread engagement prior to operation.

Changing prop size will modify thrust and RPM characteristics. Use this prop for direct replacements or when trialing small thrust adjustments on compact RC boats, and always perform balance checks and a short low-power run after fitting.