OS FSa-110-P Copper Gasket for Engine Maintenance - Hatroi HA244  [HA244]

Tuning and sealing role for OS FSa-110-P

This Hatroi HA244 copper gasket is supplied as an RC replacement specified for use with the #731 OS FSa-110-P assembly. The part is a plain copper sealing washer made to restore a metal-to-metal seal where the original gasket has become worn or was removed during engine work.

Fitment should be confirmed visually against the stated model before installation. When fitting the gasket, remove any old sealant or material, seat the washer flat, and tighten the head fasteners evenly in a cross pattern to avoid distortion. Use hand tools and moderate torque to protect internal threads typical of RC engine heads.

For tuning purposes the copper gasket helps maintain steady compression and consistent starting characteristics without changing the engine's core geometry, making it useful for rebuilds and routine adjustments. It is a basic consumable that supports predictable engine setup work.