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-   -   Alpha upper tooth count (https://www.offshoreonly.com/forums/drives-lower-units/273806-alpha-upper-tooth-count.html)

87MagnumII 04-04-2012 06:43 PM

Alpha upper tooth count
 
Got an alpha one gen 1 Trying to figure if I have a true 1.5 or a 1.47 ratio. My drive has apparently been rebuilt by a previous owner at some point because "rebuilt" is stamped in the case and the ratio number isnt there What number of teeth will the gears in the upper have for a 1.5? Number for a 1.47?

sac 04-05-2012 12:11 AM

The uppers had a 24:22 and the lowers had 17:28 which comes out to 1.5097.the Gen II.s were 1:47 if I remember correctly.

Amarket Owner 12-15-2012 12:50 PM

The upper gears are the same. A lower gear change caused the 1.47 ratio. Since you have no choice in the lower gears, just think both as one and one half ratio. Just v-8 gears.
good luck

ext2gtx 12-20-2012 06:10 PM

If i remember they no longer make the 1:50 when you buy new you get the 1:47,they are so close together you would no be able to tell the difference.


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