Ref - L-OS71607100
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, you could put them head to head and see which you prefer. The Enya 3 is also available on ServoShop. See listing below this.
Glow plugs are considered to be consumables - But by using a low voltage to start ( under 1.5 volts) and not burning the plug dry, you prolong the life of your glow plug. It is also worth washing out a new engine after running in to prevent small particles shorting the plug and destroying it. Blowing plugs on new engines is less common now a days, but is still something that can happen.