Problem solved

[JoeN'Mo]

Just a few words to say how much help this site has been. My 8N has had problems with starting and running under load. I tried new plugs, new points and condensor, checked fuel flow through carburator, air filter for rats nest, and wired out carb. orifices with an old banjo string.
Then I read a post by JMOR stating that the condensor must be grounded. I tightened the condensor (it was sliding back and forth in the little bracket), and guess what - problem solved!
Thanks JMOR
Joe

 

[old]

Well if you think about it a condenser only has one wire and electricity works ALWAYS with 2 wires in some way and with a condenser the body of it is one of the wires so to speak

 

[Hobo,NC]

It take's a sharp Sum'a Buick to catch that... My hats off to'em 8)

 

[JMOR]

(quoted from post at 21:17:04 03/26/13) Just a few words to say how much help this site has been. My 8N has had problems with starting and running under load. I tried new plugs, new points and condensor, checked fuel flow through carburator, air filter for rats nest, and wired out carb. orifices with an old banjo string.
Then I read a post by JMOR stating that the condensor must be grounded. I tightened the condensor (it was sliding back and forth in the little bracket), and guess what - problem solved!
Thanks JMOR
Joe

ou are welcome. Glad for YOUR success.

 

[Roger in Iowa]

Is it true of a coil as well. Does it have to be grounded?

 

[JMOR]

(quoted from post at 22:43:19 03/26/13) Is it true of a coil as well. Does it have to be grounded?

oil case needs NO ground

 

[Roger in Iowa]

If you google "points ignition system", Wilkopedia shows the coil being grounded. That is the basis for my original question.

 

[JMOR]

(quoted from post at 11:15:51 03/27/13) If you google "points ignition system", Wilkopedia shows the coil being grounded. That is the basis for my original question.

ou can find anything on the internet that any Joe-Blow wishes to put there. The coil on your tractor does not need to be grounded.

 

[old]

If your talking a front mount coil if you look close it has a ground on it. If your talking side mount the points are the ground point

 

[old]

Again if you have the front mount coil it has a ground point to it and if a side mount the points are the grounding point. On many of the older cars and truck there was in fact a rubber boot around the coils to help cut down on vibration so in theory they would last longer. So the case of the coil is not and does not need to be grounded

 

[Dell (WA)]

Roger........the roundcan coil metallic shell can be grounded fer RFI purposes, but is not electrically necessary for ignition coil to work. The ignition coil is classified as "auto-transformer" where the 2-coils have a common connection around a metallic/magnetic core. And surprizingly enuff, that common connection is connected to GROUND thru the POINTS. You do know the ONLY time you gitt sparkies is when the points OPEN, don't you??? .........Dell, yer self-appointed sparkie-meister

 

[Roger in Iowa]

Yes, sparks only when points open. Problem my mind is having, where is the circuit for the 20,000 volts. Is it not to the "other side of the coil", which in my mind is the case of the coil. The points are not the ground when the spark occurs, as you stated they are open.

I don't mean to hijack the thread here.

Been working on a two cylinder. Have changed coil, condensor (2X), points and still no spark from coil, let alone to the plugs, with 12 volts to coil and points. Thought it might be the coil not grounded.

Thanks for any help. I know wrong forum (2 cyl).

 

[souNdguy]

case? no.. but the points do ground the coil as the engine spins..

 

[JMOR]

(quoted from post at 13:12:17 03/27/13) Yes, sparks only when points open. Problem my mind is having, where is the circuit for the 20,000 volts. Is it not to the "other side of the coil", which in my mind is the case of the coil. The points are not the ground when the spark occurs, as you stated they are open.

I don't mean to hijack the thread here.

Been working on a two cylinder. Have changed coil, condensor (2X), points and still no spark from coil, let alone to the plugs, with 12 volts to coil and points. Thought it might be the coil not grounded.

Thanks for any help. I know wrong forum (2 cyl).

s I think someone said, 'autotransformer connected coils'. In this diagram , the common point is at HV and primary intersection at top of dwg. At instant points open, the condenser takes over as current flow path. The HV return as you call it, is both thru primary & condenser as well as thru the small ballast resistance and the very low battery impedance (resistance).

 

[Dell (WA)]

Rodger.........don't fergitt, the GROUND fer the 20KV secondary is thru the SPARKIE gap. .........Dell, sparkie-meister