Re: Points adjustment 63' 18hp Johnson
If the hold down screw has a star washer or some other kind of lock washer, therein lies the problem. The only type washer alowed on that screw would be a small wave washer.
At any rate... tighten the retaining screw first, then adjust the points. Yes, you'll be able to adjust the points with that screw tightened.
(Point Setting Of Magneto Models)
(J. Reeves)
Set the points as follows. Have the flywheel key aligned with the fiber rubbing portion of the ignition points. Adjust the gap so that a .020 gauge will pass thru but a .022 will not. Should there be any question of the points being dirty (touching the contact with your finger would cause them to be dirty), clean them with a small brush and acetone or lacquer thinner.
NOTE 1: Should the operating cam have a small portion on it with the word "SET" imprinted, align this portion with the fiber rubbing portion instead of the flywheel key.
NOTE 2: Should the cam have the word TOP imbossed on the top of it, that is a cam that could be installed upside down and this is simply telling you which side is up. It is not a position where one would set the points.