Bill Krummel
New member
I am currently diagnosing a no spark issue on a 1972 mercury 200 20hp and think i have it figured out. when i test resistant on the high speed stator coil it reads an open circuit, while the low speed reads ~180 ohms. my question is does this mean its bad or am i testing it wrong? and why is there a high and low speed stator coil? i noticed from a little googling that this may have been the only year to do it this way is it a good design?