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Recent content by mevsmyself2

  1. M

    Having timing issues. After a few minutes the timing jumps ATDC to 6 degree..? Coil not within spec.

    Markomark, thanks for your input! I do not want to sound like I am arguing. More like clarifying or asking questions. Again, I appreciate it. This is what I was looking for ultimately. I will follow up when I get this worked out a little further.
  2. M

    Having timing issues. After a few minutes the timing jumps ATDC to 6 degree..? Coil not within spec.

    Ok, good to know. So it sounds like this is not causing the timing to change. So module still the most likely cause. The diagram does not show a resistor on the signal wire, so there should not be resistance on the wire when disconnected on both ends. This measurement shows not an...
  3. M

    Having timing issues. After a few minutes the timing jumps ATDC to 6 degree..? Coil not within spec.

    Ok not a short on the signal wire, but not a un interrupted loop from end to end. I didn’t check ground, or for voltage on the line. I was thinking the same thing, the module (glad to hear some confirmation with that thought). I have one on order. The pickup coil is pretty crusty, but...
  4. M

    Having timing issues. After a few minutes the timing jumps ATDC to 6 degree..? Coil not within spec.

    I measured continuity from unplugged tach signal wire to unplugged at the coil harness and at the tach test terminal. So seems like a legit interruption there. But regardless of suspecting that I did not measure this right, what do think is the problem? What would cause the timing to jump...
  5. M

    Having timing issues. After a few minutes the timing jumps ATDC to 6 degree..? Coil not within spec.

    I have found a short in my tachometer signal wire. Also my MAIN COIL is GOOD. It tested 0.4 ohms on both ends with my other Multimeter and it tested OK. Multimeters should come with a 1ohm resistor to test them. Could a shorted tach signal wire cause the module to throw off the timing? I just...
  6. M

    Having timing issues. After a few minutes the timing jumps ATDC to 6 degree..? Coil not within spec.

    I have put fresh thermal paste. About to test with a second multimeter.
  7. M

    Having timing issues. After a few minutes the timing jumps ATDC to 6 degree..? Coil not within spec.

    GM/ AC Delco charges $125 Mercruiser charges $225 for the same part. But I found the latest one for module anyway. AC Delco Module: 19418839 . I will probably go with CDI if I do change it. I am not sure if I need to change my main COIL it seems to be out of spec. I have been told don’t worry...
  8. M

    Having timing issues. After a few minutes the timing jumps ATDC to 6 degree..? Coil not within spec.

    Hi, I am trying to narrow down my engine problem. I have a 1997 Mercruiser 3.0LX EST Ignition. I was checking timing and it reads about 1 degree BTDC and then when disconnecting the jumper and reconnecting the interrupter the timing is about 12. So within spec. Then by this time it has been...
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