Re: 1940 Farmall A with intermittent spark problem

Posted by Pete on May 16, 2002 at 18:42:16 from (205.188.192.168):

In Reply to: 1940 Farmall A with intermittent spark problem posted by Anthony Reisinger on May 16, 2002 at 17:25:25:

I had a similiar problem with a Super A that has a mag. In my case it turned out that the distributor cap was the problem. There is a small spring loaded pin in the center of the cap. The pin makes electrical contact with the rotor. In my case the spring was not constantly pushing the pin into contact with thr rotor.
Another thing to check...see if the mag is making a spark. Turn the engine with the hand crank and you will hear the mag trip. When you hear it trip you should also see a spark if you have the center distributor wire unhooked and placed close to a ground. I've seen mags worn in such a way that they make a nice spark if you can get the engine running,but at slow cranking speed they don't always make a good spark.

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