Flywheel rubbing ignition coil

[Destroyer]

Ok...got to thinking... the score marks on the inside of the flywheel are even all the way around... no mark is deeper than any other mark...and the groove is the same depth all around. If the crankshaft snout was bent so there was runout then one side of the marks on the flywheel would be deeper than the opposite side from hi-low flutter. That's not the case here. So then I put an indicator on the snout, put the engine in gear and using the prop turned the engine a few revolutions. No detectable runout on the stub.

Only one of the coils has rub marks on it. The spark coil closest to the boat hull. (There are 3 spark coils, 1 in the front of the engine and 2 that are 180 degrees from the first one at the back of the engine). Is it possible that the front coil is somehow high?? Is that even possible?

Although the groove and marks in the flywheel appear to be bright metal, it's possible that this damage is old. Upon inspecting the flywheel I can see that a few of the magnets have been re-glued, so there was obviously a problem some time in the past. Only thing I can think of to do next is put Dykem on the top of the coil, remount the flywheel and spin the engine a few times, then take the flywheel back off and see if the Dykem was rubbed off. If it was then I know that it's hitting. If it's not then maybe this is all from the PO and it's a non issue. I'm totally stumped on this one. Aside from the gumming issue the engine runs strong. I just want to keep it that way.

[spareparts]

the gumming issue came from the coils getting hot, I wonder how much the coils expand when hot,

[Destroyer]

This are a few pics of the coils and the inside of the flywheel. They're not the greatest, but you can see the rub marks across the top face of the coil, and the matching rub marks in the flywheel. Since the pic is 2D and not 3D you can't really see the groove in the flywheel, but the outside wear mark closest to the magnets is not proud, it's actually a deeper groove, caused by the metal frontplate of the spark coil. Didn't have time last night to do the Dykem thing, so will be doing that tonight or first thing in the morning tomorrow. If nothing else, the stator will be getting a thorough cleaning before being put back into service.

[THEFERMANATOR]

Um, where are your stator bolts at? there should be 4 5/16" headed bolts that hold teh stator down to the upper bearing carrier. I see the bolt holes, but no bolts in them.

[Destroyer]

Originally Posted by THEFERMANATOR

Um, where are your stator bolts at? there should be 4 5/16" headed bolts that hold teh stator down to the upper bearing carrier. I see the bolt holes, but no bolts in them.

LOL Correct... (Good eye Ferm) :) I should have included an explaination. I have them, they were where they were supposed to be. I took them out so I could lift up the stator to see if any junk was under it keeping the stator from sitting down properly and making it higher so the coil would hit the flywheel. Just didn't put them back in yet since I'm still doing a cleaning of some of the black tar that dripped down from the coils.

[THEFERMANATOR]

Looks to me like your SLOW coil is shot. That front coil with the black tar leaking out of it is for the SLOW system(rev limiter when the overheat trips it and such as well as the fast idle on start-up. I would gamble to say that it is seperating from the metal support ring at the bottom jusging from the rub marks in your picture. You see a small gap in your pics that would point to this. Looks like you may be due for a new stator.

[Destroyer]

Well, I pushed the coil down manually, then measured it in relation to the other 2 coils that were not rubbing. (It's about .007" lower) Then used epoxy, put it behind the coil and clamped it back in place until the epoxy set up. Waited a day and then started the engine. Everything seems to run ok and the engine now drops back to idle smoothly since the tar has been removed from around that area. But truthfully it worried me a little, so I ordered this
http://www.ebay.com/itm/200776406723...84.m1423.l2649
from eBay. They had it on a 12 hour sale, so I actually got it for $79 + shipping. According to the UPS shipping tracker I should have it by this Friday, so I can put in in over the weekend and keep the repaired one as a backup.

[phatdaddy]

congrats, you probably just guaranteed the old one will last forever. that's what happens to me.

[Destroyer]

Originally Posted by phatdaddy

congrats, you probably just guaranteed the old one will last forever. that's what happens to me.

LOL Oh so true!!