Re: 1968 Johnson 3hp
Oh shoot, i wouldn't part with that motor if I was you.
What you do, is remove the flywheel Then remove the phillips screws that secure the mag plate. Also, detach the linkage from the throttle handle. There's really not much to it. On the mag plate, You'll see one screw towards the rear of each of the coils, and one down by each of the point sets. Four phillips screws around the center typically hold the mag plate on. Once you loosen those four screws and detach the throttle linkage, you should be able to lift it right off. Once that is done, you'll see a brass ring mounted on the powerhead and an aluminum ring under it. You'll want to remove both of those and clean them up thoroughly of the old grease. Apply new grease and put them back on the powerhead. Then reference the four screws in the mag plate, with the holes in the aluminum ring and attach the mag plate back on the motor. Once you pull the flywheel off the motor, inspect the coils and make sure there are no cracks in them. If there is, then they'll need to be replaced.