Re: IH 400 died, no start

Posted by Steve@Advance on October 15, 2016 at 20:58:40 from (107.203.134.67):

In Reply to: IH 400 died, no start posted by super99 on October 15, 2016 at 18:24:41:

I suspect the points are corroded. The corrosion inside the cap says water has been getting in the distributor, condensing inside the cap. There may still be water in the distributor...

Try cleaning the points with contact cleaner and wiping them with clean paper. Or just replace them.

Then check for spark at the coil. If still no spark, put your test light from the point side of the coil to ground. Turn the engine over, the light should come on each time the points open, go off when they close. If the light stays on, the points are not making contact. If the light never comes on, there is a short in the wire to the distributor, the points are closed, or there is no power to the coil. Check the ignition side of the coil, if no light, there is a bad connection from the ignition switch, or the switch itself.

If all that checks out, and still no spark from the coil, the coil is bad.

Back to the water in the distributor. There can be water pooled in the bottom of the distributor housing, especially if stored outside. When the engine starts, the heat boils the water up, it condenses under the cap, shorts out the high voltage. Be sure the distributor is dry. Blow it out if possible, or leave the cap off, get some heat on it from a light bulb or hair dryer. The corrosion under the cap is usually harmless unless it's severe or carbon tracked.

Have you looked inside the non-foulers? Sometimes they pack up with carbon and need to be cleaned. That is not why it won't run, but it can cause miss fire and poor performance. If you do end up replacing the plugs, might try to find hotter plugs and remove the non-foulers. It there a thermostat and is it working? Getting the engine up to temperature?

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