Re: Farmall B coil

Posted by Janicholson on July 27, 2007 at 20:48:28 from (71.87.39.51):

In Reply to: Re: Farmall B coil posted by Dave H (MI) on July 27, 2007 at 18:26:55:

Simple test. On the side of the distributor, there is a connection that goes to the coil. Loosen the nut and remove the wire.
Turn on the house wire switch and check the end of that wire for volts. It should be battery volts, or minus a couple from battery volts. If so, it is probably an OK coil,(but not for sure)If there is no voltage at the wire in this experiment, and there is on the switch side of it, the coil is toast
If yes, take the distributor cap off and look at the points. If they are closed (together) turn on the switch again and touch the disconnected wire to that terminal you took it off of. A small,but clear spark should happen where it is touched when it is touched and removed. The wire from the center of the distributor if held with insulated handled pliers, or a dry stick, next to the block, about 1/4" away, will also spark a hot blue spark. If this does not happen, the problem could be in the points, or condenser.
Put the wire back on the distributor. With a small plastic handled screwdriver, and the switch on, reach in and open the points carefully. getting the screwdriver touching ground will not hurt anything, so do not be nervous. If this causes spark, the problem is probably that the points need to be cleaned. A fine emery board, followed by a piece of a folded dollar bill will make them clean enough to work. They should be set at .020" when the little breaker cam is opening them on a high point. Hand turning the engine is best for this, with the switch off. Try these items then get back to us. JimN

Replies:

• Re: Farmall B coil Dave H (MI) 08:26:08 07/28/07 (0)

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