Back in the 80's OMC had problems with the gears in their out-drives, the fix was to change the gears to what they called 5 deg. gears, this was a free fix to owners of these out-drives and when the up-date fix was completed they put a sticker on the top of the flame arrestor cover indicating the updated gears. Does anyone know what years were affected by this up-date and most important what year was this up-date no longer needed. I am looking at some boats in the 80's model years, some of the stickers could be missing I don't want to get one that hasn't been up-dated. Better to know what year it was no longer needed!