COIL

SeaHare

So after just running 455 miles on Lake Michigan over 9 days, we took the boat out for short 20 mile spin yesterday and everything was great. Today I went to the boat and the SB engine would not fire. Turn the key and it just turns and turns... No Spit, sputter, nuthin. So instantly I figured there was no spark. I put a spare plug right to the center ign wire going to the coil, grounded the plug, turned over, no spark...

First thing I looked at was the coil and noticed there was a bunch thin oil all over and also in the hole where the plug wire goes... After a little reading I learned that many coils are oil cooled (didn't know that). So, is it pretty safe to say that the coil took a dump? Do these just fail like that? Did the coil overheat?  THX

Black_Diamond

Heat, vibration, bad luck. They can crack and fail. At least it was at the dock! How was your trip?

Dream_Inn

I had a buddy earlier this summer have the same symptom.  First thing I did was try a different coil.  That was the problem!  His went while he was running, luckily the second engine brought him back to the dock.

SeaHare

Thanks guys, I ordered a new coil since mine was leaking. Just for the heck of it I took the coil off the other engine and tried it out, it still wouldnt fire. I went thru some troubleshooting procedures in the manual and found that my ignition sensor inside the dist is probably bad. I removed it and found it to be pretty corroded. Just ordered a new one of them too.. Should have everything on Tuesday. Ill let you know when i have JOY.... PS our trip went really well and im still plannin on posting pics when i get a little time

212rowboat

coils are funny critters... I've had them cough for a while, then die, and I've had them behave just as you described...

they are isolated with an epoxy- that epoxy sometimes leaves cavities, and the cavities allows hot spots which burn them out.. most often, that is what happens to them..

good job trouble shooting it so quickly!!!

SeaHare

I also did test the coil with a multimeter, It all tests within spec so it probably does still work. None the less, it was still leaking so replacing it is still good. Hopefully she'll fire right up after i install the new sensor.

212rowboat

Those cracks only appear when the coil is hot...

212rowboat

Al, Camshaft Position Sensor (CPS)?

SeaHare

ignition sensor

SeaHare

put in the new ign sensor and she fired right up...JOY

Dream_Inn

that is great news!!

raybo3

=D> =D> Awesome bro