You could use it, as in it will fit, but your present prop would be WAY
wrong and you would have some problems propping it.
The ratio in the outdrive affects the prop rpm.
All the Gen 1's will fit, but save yourself some problems and buy the
correct ratio. And no, it's not worth it (unless drive was free along with
the parts) to change ratios. BTW, you need quite a few special Merc tools to
do it, so get the do it yourself idea out of your mind.


wrote in message
t...
I have a 1991 Mecury Alpha one Gen I sterndrive with a 1.98-1 gear ratio.
It
is mounted to a 3L 4 cyc engine but the sterndrive ceased this summer and
I
have found another one but it has a 1.47 ratio. Can this sterndrive be
mounted onto the same engine. What about a later year model like a 1995
alpha one gen one would that fit? Lastly what does the upper unit gear
ratio
relate to? Torque...engine speed?

Lots of questions