Glow Carburettor Needles 10LA & 15LA by O.S. Engine OS21781970  [OS21781970]

Needles for 10LA and 15LA glow carburettors

The O.S. Engine OS21781970 twin-needle set services both 10LA and 15LA styles found on small glow-model carburettors and is offered as a replacement part for routine model engine maintenance. These needles are intended to restore the original adjustment interface and to deliver consistent seating for accurate tuning.

As a tuning element the needle regulates fuel flow at the valve seat and thus determines idle stability and mixture behavior. Replacing a degraded needle can address rough idling, poor throttle response, or the need for large mixture offsets during setup. This item is supplied as the needle component rather than a complete carburettor kit.

Fitting notes: install only in carburettors that accept 10LA or 15LA needles, confirm smooth travel and correct seating, then perform mixture and idle adjustments following the engine's recommended routine. Make incremental changes while observing engine response and re-check seating after initial runs to ensure repeatable performance.