Mercruiser 170/470 gear Ratio

ddrieck

Senior Chief Petty Officer
Joined
Jul 12, 2007
Messages
665
Looking to find the correct outdrive gear ratio on my 170
I am seeing several different ratios for the the 106 outdrives on SEI
 

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Pmt133

Chief Petty Officer
Joined
Jan 6, 2022
Messages
608
If still intact, you could also pop the top cap on the drive and count the teeth of the gear set and figure it out that way.
 
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