I should perhaps also point out that distributor ignition tractors sometimes "go off" on us over the winter.  A good filing of the points usually always cures them to give an instant start up.

Does anyone know of a way to stop the points getting that insulating surface of whatever it is.  The problem is definitely, in my experience more serious with magneto points than distributor points.  I have been told that they are made of different materials and certainly I have never seen magneto points pitting like distributor poinst do.

Food for thought and hopefully generate some solutions!

John