The OMC coil swap may not work. You need to measure the depth of the coil. The OMC may be too deep. I tried it on a 1939 Neptune 1.5 hp and it did not work. The original coil was a Wico setup with a 1” depth tube and OMC was about 1-1/4” deep. I contacted Standard Magneto Sales with no luck but Doug Penn set me up with coils I could use for the 2 motors I have. I had to swap the coils from the new laminates to my old ones.
