Re: No spark

Posted by Gene-AL on May 16, 2007 at 20:14:46 from (74.226.29.14):

In Reply to: Re: No spark posted by CNKS on May 16, 2007 at 18:15:36:

CNKS

You say: "If I could get current TO the distributer, I could check things out."

My take is that you probably have current THROUGH the distributor, but it is to ground all the time, and no spark can occur until the ground is opened.

If I read you right, you have a short to ground or a partial short (resistive) path to ground at the coil (-)lead or inside the distributor on the same connection. Possible places are: 1. The connector through the distributor wall has a broken/missing insulator or metal parts attached to the feed through bolt (if that's what it has) are touching the distributor case (ground). 2. The condenser is leaky/shorted or its lead/connector lug is shorted to ground. 3. Your points never open which might include some part of the points 'hot side' from the feed-through touching a ground. Have you carefully inspected the points? They also have an insulator which is the bearing that they move back & forth on. How about the points mounting screws - could they somehow cause a short by touching one of the places I've mentioned?
You could take the coil (-) wire loose from the distributor and, with the ignition 'on', see if you get a small spark at THAT wire when you touch and remove it from a ground (it should also produce somewhat less than a full high-voltage spark at the coil high voltage tower because no condenser is connected). If this proves to be the case, then your trouble would seem to be within the distributor itself.

I see nothing wrong with your description that the ignition key switch 'on' wire goes to the starter switch then the SAME wire connection continues on to the resistor, then the other resistor end to the coil (+). The OTHER connection on the starter button switch goes to the solenoid AND also direct to the coil (+) for 12V direct to the coil while the starter is operating.

I have no diagram of this tractor to go by, but I believe what I have stated should be correct, based partly on what you wrote.

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