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Antique Gas Engine Discussion

22.5 Bessemer / spark plug arc


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  #1  
Old 08-10-2005, 09:48:51 AM
Mike Helmick Mike Helmick is offline
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Default 22.5 Bessemer / spark plug arc

Having a little trouble starting a 22.5HP Bessemer lately. It doesn't want to fire initially on the gasoline primer. Took the mag off & charged it & have same problem. The spark plug is a Champion type 43 (34 or 43? cant remember). Has two points for the spark to arc. When I checked it, it only arcs to one point. Should it go to both?

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-Mike
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Old 08-10-2005, 10:39:59 AM
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Elden DuRand Elden DuRand is offline
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Default Re: 22.5 Bessemer / spark plug arc

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Originally Posted by Mike Helmick
Having a little trouble starting a 22.5HP Bessemer lately. It doesn't want to fire initially on the gasoline primer. Took the mag off & charged it & have same problem. The spark plug is a Champion type 43 (34 or 43? cant remember). Has two points for the spark to arc. When I checked it, it only arcs to one point. Should it go to both?

Thanks.

-Mike
Mike:

On those two electrode plugs you can never get both gaps EXACTLY the same and you will only get a spark to one of them or the other. This is because the one with the smaller gap will fire first and suck-up all the juice so the voltage never rises high enough to fire the larger gap.

Take care - Elden
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Old 08-10-2005, 02:22:54 PM
Mike Helmick Mike Helmick is offline
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Default Re: 22.5 Bessemer / spark plug arc

Thanks for the reply, Elden. What purpose did the dual points serve?

-Mike
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Old 08-10-2005, 02:56:47 PM
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Doug Waggonner Doug Waggonner is offline
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Default Re: 22.5 Bessemer / spark plug arc

Well, in thery if one gets dirty, carboned up ect, it would just jump to the next best place. Instead of just quit firing all together. Now weather this is the case or not i'm not sure. But its a good idea, and becides that they just look cool
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Old 08-10-2005, 04:13:20 PM
Andrew Mackey Andrew Mackey is offline
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Exclamation Re: 22.5 Bessemer / spark plug arc

Both electrodes get hot. If carbom forms on an electrode, the spark will jump to it and burn off the carbon, thus saving the metal.
Andrew
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Old 08-10-2005, 09:01:28 PM
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Elden DuRand Elden DuRand is offline
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Default Re: 22.5 Bessemer / spark plug arc

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Originally Posted by Mike Helmick
Thanks for the reply, Elden. What purpose did the dual points serve?

-Mike
Mike:

As far as I'm concerned, the purpose of the two electrode plugs was to get a little more money from the customers. I don't think there's any advantage at all.

My opinion and Iim proud of it!

Take care - Elden
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