O.S. Engine OS28704161 Head Gasket 0.1T 105HZ  [OS28704161]

Head gasket for O.S. engine maintenance

This is a replacement head gasket for RC-scale O.S. engines, identified by the marking 0.1T and 105HZ. It serves as the sealing interface between the cylinder head and the crankcase, helping to preserve combustion chamber integrity during operation and tuning. The part is intended for routine maintenance and minor tuning adjustments where gasket thickness affects head volume.

Installation notes: ensure both mating surfaces are clean and free of old gasket material or debris, confirm correct gasket orientation before reassembly, and tighten head screws progressively to seating torque recommended by your engine manual. Inspect the gasket after initial run-in for any signs of blow-by or deformation, and replace if sealing is compromised.

Tuning role: changing gasket thickness is a common, incremental way to alter head volume for compression tuning on nitro RC engines; this 0.1T option provides a small, predictable change and is best used as part of a systematic tuning process alongside needle and head adjustments.