Cooling problem solved now what's wrong with my tach?
I've been mucking around with overheating issues for some time and finally solved the problem by removing and cleaning the mixing elbow. During that time I also replaced my water temp alarm with a new sending unit and guage. For some reason now my tachometer doesn't work and I have no idea why. How does the rpm get measured on a diesel since there is no distributor or ignition box? I do have one loose wire hanging near the engine but think I remember that to have been connected to the alarm sending unit. Any thoughts??