[SEL] Now Hot tubes ?

[peter ogborne]

Now i have an engine [two flywheels but that does not make me a Nazi
sympathiser]. Re, the what i assume is the hot tube,It is a tube that is 
approx 75mm long x12mm [that's inches x1/2]. It screws in to the combustion 
chamber in a vertical position and projects externally. The tube, is a tube 
in that it is drilled out to almost  it's full length to approx 1/4 inch. At 
the non screwed end it is pointed,i.e. a diamond point. The material is 
ferrous.Am i correct in assuming that there would be some kind of glow plug 
inducing material inserted into this tube?
Needless to say that this engine is one of those old open crank ,sideshaft 
engines that some bastard took the name plate off. All efforts have failed 
to identify the maker..............still that does not matter,just makes it 
a hell of lot more interesting.
Peter Ogborne
Little Grove ,Albany
West Australia
''Heart of the Rainbow Coast ''
jopeter at omninet.net.au