O.S. Engine OS21481420 Carburettor Throttle Lever Nut 10pcs  [OS21481420]

Carburettor throttle lever nut - replacement part

This O.S. Engine OS21481420 throttle lever fixing nut is supplied as a 10-piece set for use with RC carburettor throttle linkages. The small replacement fasteners are intended for service, repair, and quick changes during practice or competition.

The nut secures the throttle lever to the carburettor spindle, preserving throttle alignment and helping to maintain steady idle. Replacing fatigued or damaged nuts is an easy maintenance measure to restore crisp low-speed response without adjusting jet or needle settings.

Fitting is simple: remove the worn nut, place the new fixing nut on the stud, and tighten while ensuring the lever moves freely and returns correctly. After fitting, test full and idle positions to confirm smooth operation and no binding from excess preload.

Compatibility note: designed for RC carburettor throttle levers and related linkage components; always check the original nut's seating profile and thread engagement before installing. Keep spare pcs in your tool bag for rapid on-site replacement.