My 720 has the dual coil, carbed Z24. The issue I'm having is the factory tach doesn't work.
I've read that the tach, volt gauge and oil pressure gauge are all on the same circuit. The oil and volt gauges work and the fuse is good. I've also checked the resistor and I got a reading of 2.21k ohms and the casing says it's supposed to be 2.2k so I know that's good!
Is there a legitimate wiring diagram for it somewhere? I found a FSM that just shows the 3 wire plug coming out of the gauge cluster but not really where it goes.