There is the “timing” of when the points open, and you have the timing where the plug fires in relation to the location of the piston. The timing of where the plug fires in relation to the location of the piston is determined by the position of the magneto plate, controlled by the lever attached to it. The “timing” of when the points open is a setting. Having both cylinders to fire 180 degrees apart is a result. The best spark is achieved if the points open exactly when the magnetic polarity changes as the magnet pass over the coil. If you achieve this with both set of points, they will open exactly 180 degrees apart from each other. This is done using a timeing tool. Richard makes them for the OMC universal magneto. If you don’t have a timing tool, you follow the factory point gap setting. While this gets you very close, its not as precise as having a timing tool. People who have used Richards tool, on the OMC magneto, say they notice an improvement in how their motors run. It could very well be true as the coils would now be producing there best spark.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
