Bought a boat to part out, can you help me identify this outdrive

[Newbie@boats]

Boat has a 1989 Merc 3.0L I plan on selling the misc parts including the outdrive and the trailer and giving the hull away for free. Obviously an alpha 1 gen 1

Could anyone tell me possibly what the gear ratio would be? I included a pic as well

 

[Bt Doctur]

looks like a standard Alpha 1 drive ,can you tell us what motor was in front of it?

 

[Newbie@boats]

4 cylinder 3.0

 

[Bt Doctur]

usually a 1.98-1 ratio

 

[Newbie@boats]

Great thanks

 

[Alumarine]

You can find out by rotating the input shaft and counting the no. of revs it takes for 1 full rev of the prop shaft.