Re: 1925 johnson evinrude 4cyl
I don't think I have run a Lightfour myself, nor do I have one.
I do have a few Zephyrs though, a smaller 4 cylinder 5.4hp. The Zephyr is the smallest, mass produced 4 cylinder in the world.
They have 2 decks of opposed cylinders firing alternately in pairs, like the Lightfour here.
The Lightfour and the Zephyr have a coil, point set and condenser for each opposed set of cylinders.
The idea behind the 4 cylinders on such a small hp motor was to improve idle. I think the jury is still out on that though.