1960’s 18 Hp Evinrude

[Evinrude 25]

There is a video on the youtube which shows you how to do it. I copy the procedure from other forum.

If the armature plate has a a loose fitting, wobbling motion (the plate that the points, coils etc are attached to), it is usually caused by a slightly worn support ring. This allows the point setting to change erratically as the armature plate turns.

The cure is to remove the armature plate so that the support which is attached to the powerhead with 4 screws is visible. Then, with a screwdriver and hammer, or some tool of your choosing, and looking straight down at the support ring, make a slight indentation at what would be called the 12, 3, 6, and 9 O’clock positions. Install the armature plate and check for a smooth turning wobble free movement.

You may need to do that procedure a few times to obtain the proper fit (not too tight, not too loose), but it’s worth the effort. If it is too tight, use sand paper sands over these points down a bit.

Use a small amount of anti corrosive grease between the aluminum ring and the brass support plate and also on the brass bushing of the armature plate when all is well.

• This reply was modified 3 years, 5 months ago by Evinrude 25.

[Buccaneer]

Evinrude25……. good method to tighten up the mag plate, but I tend to “punch mark”
the plate a little more than needed, and end up sanding as you say.
Much easier to start with very light punches and check it!

Prepare to be boarded!

[Author]

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