[SEL] Ignitor question

[Bob W7AVK]

Mike - I'm not a guru on the subject but found this article very well 
done.  Check out and good luck.  http://www.old-engine.com/magign.htm

Regards,

Bob



Michael Tucker wrote:
> Howdy all,
> 
> I have a couple of igniter questions. I know that with spark plugs, a 
> spark plug may have a reasonable spark outside of the cylinder but fail 
> to spark inside the cylinder under compression. Is that the case with an 
> igniter? I'm getting irregular spark out of the igniter on my 1907 4 hp 
> IHC Famous. Although there are times when it doesn't spark at all and 
> I'm not really sure which wiggle or other assorted voodoo seems to get 
> it to spark, whne it sparks it seems to spark well when it's grounded 
> outside of the cylinder. However, when it's installed on the engine I 
> don't seem to be getting spark (plenty of gas, plenty of compression and 
> timed correctly). So, back to my question, are igniters like spark plugs 
> in that they may not fire correctly under compression?
> 
> That's the situation and question for educational purposes but I guess 
> that the bigger and more important question is who have y'all used that 
> rebuilds igniters who will be able to do it BEFORE Portland?
> 
> Thanks for the help,
> Mike
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