Likely the 90 HP Force (or the 120)What engine are you dealing with?
Brand, year model, horse power?
Are you checking the timing at the top (number 1) plug?
Check your wiring as wellI've got a 94 Bayliner jazz that seems to be 180 out on timing when u try to adjust timing no matter where u move the adjustment screw and TDC is on back of engine