Re: Old SW tachs
There are two models of the greenline pedestal. They both look the same externally. One uses a sender and one does not. It you take the rear cover off is it easy to tell. The transistorized tach(no sender required) has 3 pins labeled 4, 6, and 8. There is a wire that can be moved between the 3 posts to select the cylinders.
Jason
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