I’ve never seen any marks on the flywheel. There are two marks on the armature plate. A quick and easy way to figure it out would be to place the flywheel with the inspection window over the points and then mark the flywheel in between the two timing marks on the armature. Then you would cut away all the unnecessary parts of the flywheel. Seems like a big waste of time to me when Frank makes the tool and it’s reasonably priced. I have one of his and four other factory fixtures. His are better.
Now the real question is what is the best initial timing setting for your outboard? I have to believe that with today’s fuel and oil we are running less initial timing than is optimum. I know the outboard racers increase the initial timing a lot and my 1951 Chevy came alive when I bumped the timing up 13 degrees. Maybe someday I’ll experiment with it on a 1950’s OMC and see what happens.
Wayne
Upper Canada Chapter
uccaomci.com
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