GF40 Head Gasket for GF40 Engines - O.S. Engine OS49404160  [OS49404160]

Replacement GF40 head gasket

The OS49404160 head gasket is a replacement gasket built for O.S. Engine GF40 series glow engines. It seals the interface between the cylinder head and crankcase to preserve combustion chamber pressure during running and service.

This gasket is intended for direct replacement during routine engine service or full rebuilds of GF40 engines. Whenever the head is removed during maintenance, fitting a new gasket will help restore proper sealing and reduce compression loss.

Installation notes: make sure mating surfaces are clean and free of old gasket remnants, align the gasket to any dowel pins or locating features, and tighten head fasteners evenly in a criss-cross sequence to prevent distortion. Do not overtighten and check head and crankcase faces for flatness before final assembly.

Role in tuning and maintenance: a fresh, correctly seated gasket helps maintain stable compression, which supports consistent carburetor and ignition adjustments on RC glow engines. Replace the gasket if you observe damage, flattening, or evidence of fuel wash.