Re: omc 4hp timing marks

[Don]

Well, having the points start to open at the second mark means the point timing is at the retarded end of the spectrum. I would try to set the mark more towards the middle between the two marks. New points are usually set to the first mark (right mark in your picture) to account for initial rubbing block wear.
All that being said, I just wouldn’t expect a 4hp to idle as nicely as the older 3hp models, but resetting the points might be worth a try, too bad you have to remove the flywheel again to do it.