Mercury 60HP ignition coil not working?

[dvilla]

Is it possible or has anybody else seen ignition coils start working after 5-10 minutes of idling?
Been fighting ignition problems all summer. Found bad trigger causing no spark on one cylinder. At same time I had 1 or 2 cylinders causing me problems at start up. By the time I checked connections, switched wires around and started it a few times it would start running fine. Then run all day like a champ.
After changing trigger I expected all problems to go away. Switch box has been tested, swapped, replaced with original and intermitant problem is still here. There is good voltage between switch box and all 3 coils all of the time.
Really need to prove to myself where the problem is coming from before I buy more parts.

 

[dvilla]

Re: Mercury 60HP ignition coil not working?

Back to the shop. Swapped 3 different coils and none of them would show a spark using a timing light on the spark plug wire. But the timing light would trigger if clipped on the small wire running between the switch box and the coil. That is why it seemed the coil was bad.
Switched wiring up and down on the switch box and was able to move the problem around. Not good.
Finally went back to shop, got the new switch box again and put it on. Everything firing great now.
Seems my trigger was bad originally. Tried the switch box first, but of course it didn't fix the problem cause trigger was bad. Put old switch box back in then replaced trigger. Good trigger then but intermitant problem child switch box.
After a couple months of messing around, I'm still not fully convinced everything is perfect, but two days on the lake with no problems really felt good!