Model of outdrive?

grewvin1 · Dec 30, 2012

1987 merc. lower units, ser# OB683659 & OB683660 what type of drive do I have? Alpha 1? or Alph 1 Gen II?

Don S · Dec 30, 2012

Re: Model of outdrive?

They are Alpha I drives, both are 1.50:1 gear ratios.

grewvin1 · Dec 30, 2012

Re: Model of outdrive?

What is the diff. from the Alph 1 and Alph 1 Gen II ?

Don S · Dec 30, 2012

Re: Model of outdrive?

You should spend some time looking at the stickies. They are stuck to the top of the threads for a reason.

http://forums.iboats.com/mercruiser...cellaneous-mercruiser-information-329915.html

TilliamWe · Dec 30, 2012

Re: Model of outdrive?

grewvin1 said:
What is the diff. from the Alph 1 and Alph 1 Gen II ?

Just about everything, except the type of shifting in the lower unit, the props that will fit, and the black paint.