Specially developed by Enya for Four-Stroke engines, this plug gives improved stability at low engine speeds compared to the Enya No. 3 glow plug.
For many years modellers have used the Enya 3 Glow Plug in two strokes and four stroke in all makes of engines. The No 3 is a plug that runs as well in four strokes. In many cases we find the No 3 performs better than other specific four stroke manufacture plugs.
Imagine what would happen if Enya took that world beating favourite Enya No 3 glow plug and made it more suitable for four stroke?
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.