Throttle Lever Fixing Nut (10 pcs) - O.S. Engine OS21481420  [OS21481420]

Compact replacement nut for throttle linkages

This O.S. Engine OS21481420 throttle lever fixing nut provides a small, serviceable replacement intended for RC carburettor throttle linkages. Supplied as ten pieces, the kit is suitable for workshop maintenance or swapping parts between runs.

The fixing nut locks the throttle lever onto the carburettor spindle, keeping throttle geometry consistent and helping to maintain repeatable idle settings. Addressing worn fastening hardware is a straightforward way to recover sharp throttle response without changing carburettor jetting or needle position.

To fit, remove the old nut from the lever stud, place the new fixing nut on the threaded section and secure while ensuring smooth lever movement and correct return action. After installation, confirm full and idle throttle positions to rule out binding or undue preload on the servo or return spring.

Selection tip: intended for standard RC carburettor throttle levers and linkage parts; always compare the seating profile and thread engagement with the existing nut to confirm compatibility. Keep spare pcs in your pit box for quick replacement during events.