Hatroi HA244 Copper Gasket - Replacement for #731 OS FSa-110-P  [HA244]

Durable copper seal for OS FSa-110-P

This Hatroi HA244 copper gasket functions as an RC-sized replacement specifically for the #731 OS FSa-110-P assembly. The item is a simple copper sealing washer designed to reestablish a clean metal-to-metal contact where the original gasket has worn or been removed in service.

Compatibility is confined to the stated reference; inspect fitment before installing. During replacement, clean both mating surfaces of old material and residue, lay the gasket flat, then tighten the head bolts evenly in a cross sequence to avoid distortion. Use appropriate hand tools and avoid over-torquing to protect threads common to RC engines.

From a service life perspective the copper gasket provides robust sealing that supports steady compression and consistent starting behavior on nitro RC engines. It is a straightforward spare for rebuilds and maintenance that does not alter the engine's dimensional setup.