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OS Engine Glowplug No.7 (Medium/Hot)
A Medium/Hot glowplug for most types of aero or heli engine. A completely new design of coil is used to enhance performance. Particularly suited to engines running slightly rich to give a stable idle, broad peak needle setting and punchy acceleration. Is very practical for lower aircraft RPM applications. Helicopters will benefit from aa more stable hovering RPM too. Similar specification to Enya no3