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first mercruiser - 2.5 need help on locating outdrive

vroomZOOM

Regular Contributor
ill admit, I am a total sterndrive noob. this is my first one, got it and the boat pretty cheap. it is a mercruiser 2.5, 1987 or close to that, but it needs an outdrive. I know it is probably an alpha one that I need, but is an alpha one an alpha one? or are there different gear ratios in the alpha one outdrives, and which particular one do I need? any help would be appreciated.
 
Ayuh,..... Ya need a drive with a 1.98:1 gear ratio,.....

You can bolt on, 'n run an Alpha 1, or a MC-1, commonly call a pre-alpha,....

The "Gotcha" that'll getcha with buyin' an ole MC-1, in 1.98:1 gear ratio is, the input drive shaft is 'bout an inch to short, which will cause the coupler splines to fail,....
Ya gotta swap on a Alpha 1 drive shaft, to run a MC-1,.....

An Alpha Gen.II will Not bolt up, 'n run,......
atleast not without major modifications to the transom housin',....
 
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