Throttle Lever Fixing Nut Pack 10 pcs for O.S. Engine OS21481420  [OS21481420]

Precision throttle lever nut for consistent idle

This O.S. Engine OS21481420 throttle lever fixing nut is a service replacement intended for RC carburettor throttle linkages. Supplied as a pack of 10 pcs, it is useful for maintenance, repair, and quick part swaps during tuning sessions.

The fixing nut secures the throttle lever to the carburettor spindle, helping to keep throttle geometry consistent and idle repeatable. Addressing worn or loose fixing nuts can restore sharper throttle response without the need to alter main jet or needle settings.

Fitting is simple: remove the existing nut from the lever stud, install the new fixing nut on the threaded section, and tighten while verifying smooth lever travel and correct return. After installation, check idle and full-throttle positions to ensure there is no binding or excessive preload affecting servo centring or the return spring.

Selection advice: this item is intended for use with RC carburettor throttle levers and related linkage hardware; confirm the original nut profile and thread engagement before fitting. Keep spare pcs in your maintenance kit for quick in-field replacement.