FS-95V Precision Head Gasket OS40914000 for O.S. Engine  [OS40914000]

Cylinder head seal for FS-95V

The O.S. Engine OS40914000 head gasket is an RC-scale replacement made for the FS-95V engine series. It seals the cylinder head to maintain consistent combustion compression and to stop leakage between the head and crankcase in glow-fuel engines.

Fitment applies only to the FS-95V designation noted in the product name. Be sure the engine code on your cylinder head matches FS-95V before buying. Compatibility beyond the stated model is not assumed.

Installation is routine for users experienced with glow engines: remove the head, clean the mating surfaces of any debris or old gasket remnants, set the gasket flat on the head or crankcase surface, and tighten the head screws using the manufacturer's recommended torque sequence and values. Avoid over-torquing, run briefly and recheck compression and idle before final tuning adjustments.

In tuning workflows the gasket is a reliability item rather than a tuning part; consistent head sealing preserves stable compression which directly supports predictable needle changes and repeatable engine behavior during break-in and subsequent tuning.