Hatroi HA244 copper gasket replacement for #731 OS FSa-110-P RC engine  [HA244]

Replacement copper gasket for OS FSa-110-P

This Hatroi HA244 copper gasket is an RC-scale replacement part specified for use with the #731 OS FSa-110-P assembly. The part is a simple copper sealing washer designed to restore a clean metal-to-metal seal where the original gasket has worn or been removed during engine service.

Compatibility is limited to the stated model reference, fitment should be confirmed visually before installation. When replacing the gasket, clean both mating surfaces of old material and residue, seat the gasket flat, and tighten head fasteners evenly in a cross pattern to avoid distortion. Use appropriate hand tools and avoid over-torquing to protect threads common to RC engine assemblies.

In tuning and maintenance contexts the copper gasket performs a sealing role that supports stable compression and predictable starting behavior on nitro RC engines. It is a basic spare that assists routine rebuilds and quick service checks without altering core engine geometry.