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 3glow 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.