Alpha one 1.50 vs 1.47

[chandalen]

My drives are / were Alpha 1 gen 1 at 1.50:1 ratio.

A replacement drive is 1.47:1

Is it bad mojo to have one drive new at 1.47 and one old at 1.50 ?
Is the 0.03 difference really an issue or is the issue more of mixing an old and new drive?

thanks,

 

[MasterFab]

Mercruiser altered the ratio from 1.5 down to 1.47 in order to help prevent gear wear in the unit. In a nutshell, the older 1.5 ratio allowed the same teeth within the drive unit to mesh in a repeating pattern, possibly resulting in uneven wear and a shorter life. Mixing the two ratios is not a problem - you'll never notice it.

Dale

 

[chandalen]

Thanks much for the information