1982 9.9/15 Evinrude flywheel and coils rubbing?

[Jonlando]

Hello everyone,
This motor and outboards are new to me. Just got this one running good and got around to looking at an odd sound. I believe this is the cause. I measured the inside of the flywheel with a good micrometer and found no discernible out of roundness or warping. Did the same with the coil assy and found no issues. Remounted flywheel several times with no change in fault.

 

[flyingscott]

That looks like an electric start stator. Make sure it is centered.

 

[Joe Reeves]

Notice closely the seat that the metal portion of the coils sit upon.... You'll see a very slight bevel there.... The vertical metal portion of the coils should align with the inside top portion of the bevel. That gives the proper clearance between the coils and the flywheel magnets.

 

[Jonlando]

Flyingscott. Yes it is an electric start. Model E10selcns. As far as I can tell it is centered. There is no room for adjustment. There are 3 mounting bolts with no wiggle room.

Joe Reeves. I noticed the bevels you refer to and from what I recollect most of coils vertical edges are even with the bevel edge. However, the few coils being struck do hang over a couple thousandths I think. I’ll post a picture with the stator installed tomorrow afternoon. There is no adjustment as far as I can tell though...


Thanks for the replies.

 

[F_R]

Check for bearing looseness (shaft moving back and forth).

 

[Jonlando]

I did not break out the magnetic base and dial last night (couldn’t find it). There is slight vertical movement in line with the piston none side to side. Barely discernible by touch really. However, with the flywheel slinging around at speed it could be worse. It does catch when I move the flywheel around by hand and I can see the timing plate lift as it catches.

Thanks for for the reply.

 

[Joe Reeves]

I did not break out the magnetic base and dial last night (couldn’t find it). There is slight vertical movement in line with the piston none side to side. Barely discernible by touch really. However, with the flywheel slinging around at speed it could be worse. It does catch when I move the flywheel around by hand and I can see the timing plate lift as it catches.

Jon... My previous reply about the bevels... I didn't notice the picture of the stator until after I typed that reply which wasn't applicable, sorry about that.

Your latest post caught my eye (in red).... the flywheel isn't grabbing anything, not literally anyway... it is the flywheel magnets flux attracting the metallic portion of the stator upward... and I mean no offense to your intelligence as I'm sure you're aware of this... just pointing out that I'm aware of it also.

However, the plate lift you mention... There should only be a few thousands of clearance to allow that unit (timer base/armature plate) to rotate (hardly noticeable). I'm wondering if there is too much clearance which might allow the plate to tilt. Just a thought.

 

[F_R]

My thoughts agree. Check for excessive plate wobble and side-to-side movement.

 

[Jonlando]

I’ll check clearances this evening and post results.
Thanks for the replies.

 

[Jonlando]

I checked lateral movement inline with piston on the crank with the dial and it is at .0056. Of course that is without engine running or flywheel weight. It appears the crank seal has lost its sealing properties. I mic’d the stator plate and where it mounts on the motor. Both inside and outside measurements are nearly identical around 2.06. The plate assy does wobble about 1/8-1/4 inch up and down. All bolts are tight and metal components seem solid. The brown plastic spacer ring circled in yellow in the picture, could that cause the wobble effect in the plate assy?

 

[F_R]

Possibly.

 

[oldboat1]

"Insert a needle nosed pliers into the slots in the ignition plate bearing, and compress the bearing while guiding the ignition plate into position."

(The brown plastic spacer ring in your picture is the bearing.)

 

[Jonlando]

I will do that and post results tomorrow evening.

Thanks for for the reply.

 

[Jonlando]

I couldn’t make it work with the needle nose. So I put a small dollop of super glue on the top and affixed the 2 sides together. Assembled the plate and there was a significant reduction in wobble. However, the flywheel and stator are still “catching” at the same point. The plate bearing still moves side to side a little even with it connected together. I will have her see if they have a new one when she picks up my oil seal in the morning. If not, I’ll modify this plate bearing to fit tighter.

 

[Jonlando]

So I have a new bearing on order and I filed the connecting edges of this one to eliminate the slack. I added the small dollop of glue to hold the two sides together and assembled the unit. The flywheel and stator still “catches” however, it is very minimal yet still in the same spot. It happens at the same 2 spots in flywheel revolution 180 degrees out from each other.

 

[Joe Reeves]

That plastic/nylon bearing has that spring action to it for a reason... and your glue action is eliminating it?...
Think about that.

 

[racerone]

The flywheel magnets are causing some action and drag.----I would say that is normal.------o point overthinking this

 

[Jonlando]

I do not think it is normal for this motor. I have been wrong before and this is my first outboard experience. However if you look at the pictures in the initial post you should be able to see where there is damage to the flywheel and stator coils from this “drag.” I am trying to eliminate and reduce further grooves and damage. I have not been able to find any warped or misaligned pieces to cause this. The glue was an experiment to remedy this problem. The new bearing is on order as stated previously.
Thank you for the replies if I am putting too much stock into this I can let it ride I guess.

 

[Jonlando]

I ended up pulling the motor out and apart to check the upper crank bearing. The upper seal was hiding a very loose crank bearing. Also lower crank seals are shot as well. Ordering rod and crank bearings since it’s out with the new seals.