For #831 OS FS-200S-P Copper Head Gasket - Hatroi HA245  [HA245]

Head gasket in copper for OS FS-200S-P

The Hatroi HA245 copper gasket is an RC replacement head seal made to fit the #831 OS FS-200S-P engine. It provides the sealing surface between the cylinder head and crankcase in glow engines, helping maintain compression and a properly sealed combustion chamber during routine service.

Fitting the HA245 is a straightforward shop task: remove the cylinder head, clean the mating surfaces of any residue, set the copper gasket flat, then reassemble the head using the engine manufacturer's recommended fastener pattern and even, gradual tightening to avoid distortion. Never try to change the gasket's thickness or shape and avoid overtightening bolts.

In tuning terms, replacing a worn copper gasket restores consistent compression and can correct symptoms like poor throttle response or higher fuel use. Treat the HA245 as a consumable item and keep spares when preparing for regular tuning or engine rebuilds.