My rudder shaft has a 9/16's hole right through the shaft 7" above the lower bearing. I can see no mention or picture of this in the manual breakdown (52A-2). To me this looks like it was done at production rather than a later date. Is this hole for a steering link mechanism to the outboard or something else please? If anyone can direct me to more info on this, it would be greatly appreciated. Here's a pic for CD, I know how he loves pictures
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