sorry i'm so full of questions

[PowerAddict]

How do i figure out what type of lower unit I have. and how do I know which ones would work? (i.e. alpha bravo or the generation?)

its on a 140hp mercruiser on a 73 cobalt.

I'm soooo new to boats. I'm a mechanic so I wouldn't say I'm dumb but these boats sure are different animals.

 

[Haut Medoc]

Re: sorry i'm so full of questions

Basically, you have an Alpha One, Generation 1 with a 2:1 gear ratio....
If it has the 'eyehook' it is pre alpha, but for all intents & purposes any alpha will bolt right on to your bell housing....​

 

[Reel Poor]

Re: sorry i'm so full of questions

If you need to change the drive be sure to replace it with the correct gear ratio.

 

[PowerAddict]

Re: sorry i'm so full of questions

is 1.98:1 the same as 2:1 (the 2 is just rounding up)

is this ratio driveshaft turns to prop turns? why is this so crucial? I told you I'm a newb....

 

[Haut Medoc]

Re: sorry i'm so full of questions

1) Yes....
2) Yes....
3) It keeps the motor from 'lugging' by keeping it in it's proper power band, thus making life easier for the engine's innards......​

 

[Bondo]

Re: sorry i'm so full of questions

Alot of Great general Info in Here.............