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

Gasket role and fitment for GT55 carburettors

This OS29781500 GT55 carburettor gasket is an RC-scale replacement seal made to close mating faces inside the carburettor and prevent air or fuel seepage that disturbs mixture and idle consistency.

It is intended for maintenance and rebuild tasks on glow/nitro engine carburettors in model vehicles. The gasket is a small service part used to restore correct sealing after disassembly for cleaning, needle swaps, or routine adjustments. Treat it as a consumable during regular carb rebuilds.

Installation overview: remove the carburettor from the model, disassemble only as needed to expose the mating surfaces, clean contact faces, fit the OS29781500 gasket, then reassemble using correct alignment and torque practices. Bench-check idle and throttle response before refitting to the engine bay.

Tuning impact: a proper seal eliminates unmetered air that can hide incorrect needle settings or cause erratic running. If idle is unstable or the engine hesitates after a rebuild, inspect the gasket seating and surrounding contact areas. Also check the throttle shaft and mounting screws for alternate air paths that mimic a gasket failure.