I have 13`4 boston whaler with the old cable steering. The motor is a 40 hp a yamaha. Would like to change over to safer steering system. Been looking on the net. Which teleflex system would be best and safe and for my boat and motor? Also, I need a tach to monitor my 1993 40hp erll yamaha. Does yamaha have a tach that would plug and play for my old engine. Appreciate any advice.