, if i only could explain this in Norwegian to you! then u would understand it.. as i am not very good in English, and specially technical words
so cant you borrow vroooom ptssssh translator

because: hvis tenningen er snud 180 grader vil timingen være forskjellig som det er postet her

2 --------- 4

1 --------- 3

som den ene har mens den andre har

3---------1


4---------2

noe som da resulterer til at den nederste har 180 graders vridd tenning.

u did not understand a word did u.

the timing at the bottom has a 180 degrees turned ignition