Hello people. I have a question regarding setting base ignition from the distributor regarding an h22 which is 15 +/-2 degrees. It has 3 points on the flywheel when the timing light is flashed. The middle says 15. If my pointer points to the lower mark (the one towards the front bumper), does that mean i'm advanced to 17 degrees or retarded to 13 degrees. Looking forward to any helpful responses, thanks.