chipperstrauss
Cadet
- Joined
- Jun 5, 2019
- Messages
- 14
I recently acquired a 1972 Mercury 650 3 cyl in pieces but attached to a 1970 Larson Lapline and on a trailer. A previous owner installed a CDI Electronics CDI switch box and coil. I replaced the coil and can get a spark manually by following the CDI Electronics troubleshooting instructions for the CDI switch box (P/N 114-4796). When I connect the switch box to the trigger wires from the distributor, I loose the spark from the coil. I just spoke to CDI tech support (who have been very helpful). I asked for voltage spex for the wires coming from the switch box which connect to the trigger wires. They said the white/black wire should show >= 9 volts and, using a DVA, the black to blue should show >= 3 volts at cranking speed. I went back to suspecting the switch box because a second distributor, also preowned, showed the same symptom. I have a third distributor which I still need to test. My engine doesn't have a tilt switch. I have disconnected the rectifier and starter solenoid and will replace with new aftermarket components. I have a fully charged battery to connect to the switch box. I use jumper cables to power the starter motor. I will test the voltages on the CDI box this morning and update this posting. In the meantime, any thoughts on what I am missing or what direction I should go. Is the trigger a common or rare failure?
I await your advice,
Chipper
I await your advice,
Chipper