The OS49404160 head gasket is a replacement RC-scale gasket designed for O.S. Engine GF40 series glow engines. It functions as the sealing element between the cylinder head and crankcase to preserve combustion chamber pressure during operation and maintenance.
This gasket is intended for direct replacement during routine engine service or rebuilds for GF40 engines. When refreshing a glow engine, fit a new gasket whenever the head is removed to restore proper sealing and minimise compression loss.
Installation notes: ensure mating surfaces are clean and free of old gasket material, align the gasket correctly with dowel pins or locating features, and tighten head fasteners evenly in a criss-cross pattern to avoid distortion. Avoid overtightening and inspect head and crankcase faces for flatness before assembly.
Role in tuning and maintenance: using a fresh, correctly seated gasket helps maintain consistent compression, which supports repeatable tuning of the carburetor and ignition settings on RC glow engines; replace the gasket if damage, deformation, or fuel wash is evident.
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