i have a 1985 50 hp evinrude, model E50BELCOB and serial # J0539389. There is a tach on the dash but nothing on it is hooked up. My question is, what wire do I need from the motor to hook to the tach as the sender? Also, there is a dial on the back of the tach, what position does it need to be in? Thank you all in advance!
