RE: continuously plug heater is necessary?
....no, it's not necassary. When the glow igniter is "on"....it makes the
plug burn hotter than normal, which can cause overheating sometimes.
Even with an onboard glow system, the glow is only "on" at below 1/4
throttle, to start the engine, and to keep it running a low speeds. [sm=teeth_smile.gif]
FBD. [sm=teeth_smile.gif]