Outdrive gear ration question

Rapidroy5858

Would anyone know what gear ratio I would have in my 2003 312 FV?
I need to replace a cracked lower unit but I cannot find anything indicating the gear ratio of the drive.

aero3113

I would think 2.20.1 but look for the tag, it’s on the upper unit usually covered in paint. Here are both of mine.

PickleRick

You can use the engine serial number to look it up via mercruiser dealer.  Assuming it was properly registered.  You'll be able to get the drive serial number off of the registration.  Good idea to keep these numbers saved. 

SEI engineering is now selling bravo 1 and bravo 3 uppers and lowers if you end up looking for a cheaper alternative to mercruiser. 

Rapidroy5858

So today I found the engine/drive info ( see pic) card that came with the boat originally, called Mercury to see if they could use the serial # for the drive off the card, the mercury guy told me the serial # indicated the boat came with bravo 2's .. every 312 I look at online shows Bravo 3's.. I def have bravo 3 drives. 
Now I am really confused
Wondering if the wrong info was filled out on the info card.