GT55 Replacement Carburettor Gasket OS29781500 for O.S. Engine  [OS29781500]

Fitment notes and service guidance

The OS29781500 GT55 gasket is an aftermarket replacement seal for model carburettors, intended to seal mating faces and prevent unmetered air that disturbs mixture and idle performance.

It is meant for maintenance and rebuild operations on glow/nitro engine carburettors in scale models. This small service component helps restore proper sealing after the carburettor is opened for cleaning, swapping needles, or making minor tuning adjustments. Treat it as a routine replaceable item.

How to fit: remove the carburettor from the chassis, disassemble only as far as needed to reach the mating faces, clean contact areas thoroughly, install the OS29781500 gasket, and reassemble using correct alignment and screw torque. Validate throttle response and idle at the bench before reinstalling into the model.

Tuning considerations: installing a new gasket can change idle and mixture behavior by removing stray air paths. After replacement, recheck needle settings and perform a brief bench tune to verify stable running; also inspect throttle shaft seals and screw holes for hidden leaks.