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More 1956 30hp Johnson Vacume switch

J

James Camp

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" Thanks for the info on what

" Thanks for the info on what that part is for folks. One more question about it though if you would not mind.

Since the only portion of the vacume switch that is in contact with the block in any way at this point would be the back which seems to be some sort of plastic or other composit material that does not look to be a very good conductor of electricity, I make the following observation and ask the resulting question.

Of the four metal screws attaching the plastic back to the metal housing I notice that one of them is about 1/2" to 3/4" longer than the others. The screws are placed into the part from the back which leaves the threads of that longer screw protruding out of the metal housing of the vacume switch. Should there be a wire connected to that longer screw and leading to the block(ground) so that when the switch is activated it makes a connection to ground to shut down that set of points or am I incorrect in thinking that the backing of this part in a non-conductive plastic?

P.S. I knew the lead on the starter, which was set up to connect directly to a battery terminal, has nothing to do with the ignition. I mention it only because I know that it SHOULD be connected to a selinoid which is normally done using a flat connector with a round hole and not a standard battery terminal connector, which is why I wanted to question the wiring on this part since I was not sure what it was or what it is supposed to do.
After seeing that connector I don't want to trust anything wired by who ever had this thing before I got it.

Thanks for the info from you both and please, help me out on the rest of the question.

James "
 
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