Hatroi HA245 Copper Gasket for #831 OS FS-200S-P, RC engine head seal  [HA245]

Copper gasket for OS FS-200S-P

This Hatroi HA245 copper gasket is an RC-scale replacement head seal designed for compatibility with the #831 OS FS-200S-P engine. It serves as a direct sealing interface between the cylinder head and crankcase surfaces in glow-type RC engines, helping maintain compression and proper combustion chamber sealing during routine service.

Installation is straightforward for hobby workshop maintenance: remove the cylinder head, inspect mating surfaces for burrs or residue, replace the old gasket with the HA245 on a clean surface, then reassemble the head using the engine manufacturer's recommended fastener pattern and careful, even tightening to avoid distortion. Do not attempt to alter the gasket thickness or shape, and avoid overtightening fasteners.

In tuning and service terms, the copper gasket's role is to preserve consistent compression and to prevent fuel or oil seepage at the head joint; replacing a damaged or flattened gasket can restore lost compression symptoms such as poor throttle response or increased fuel consumption. Because this is a simple consumable part, keep spares on hand when performing engine rebuilds or frequent track maintenance.