Originally Posted by
leerjet1
I wondered the same thing, why don't they put some numbers on there so we don't have to guess? So what is that mark all by itself to the left?
It's a negative sign. For retarded timing, instead of advanced timing on the positive side.
Not sure, but it's my understanding that at 0 it still has some mechanical timing built in, I don't think 0 is really an absolute 0.