I'm got a 96' bayliner with a force 120. It is a cdm ignition system. I'm not getting any spark from any of the cylinders. The problem was intermittent. The shop I took it to "Tracker boat center" swapped out the stator, trigger, all 4 cdms, and ran all tests on it. The flywheel has been swapped as well. There is no problem with the stop circuit. They ran all tests from the manuals and everything is testing correctly but no spark. This is happening on all 4 cylinders. The only info I found off is that the tech said that the trigger gets the signal (Between .2-2 volts at the cdm) but when everything is together and plugged in; it doesn't. The grounds are all good. Please help with what it could be. The shop gave me the boat back without charging me anything. They said that it should be working perfectly, but they can't get a spark; not even a small voltage. The Mercury tech supports says it sounds like cdm problems but were all replaced and swapped back and forth with my 4 and the 4 new.
Another detail is that when I first tested the boat; there wasn't any ground going to the backing plate where the trigger, rectifier, and cdm's were grounded to. I jumped a wire from the engine ground to the plate. Not sure if it helps but hopefully.
Another detail is that when I first tested the boat; there wasn't any ground going to the backing plate where the trigger, rectifier, and cdm's were grounded to. I jumped a wire from the engine ground to the plate. Not sure if it helps but hopefully.
