Makes sense. So, this tells me that if these 60-70 and 80 year old engines have been moved around and flywheels changed out perhaps (as they say up here in Maine - "hard tellin not knowin") , that timing these old engines may best be done using a test other than with timing marks? Timing marks on a flywheel will get the engine close, and if the same flywheel almost right on or on the sweet spot.
Generally speaking, (assuming that the engine has been through several owners and the history is unknown and flywheels changed out (example: finding a 12V flywheel on what should have been a 6V engine)) what would be the best tool and test to determine optimum timing and firing?
