Changing the upper gear ratio in a SX-M out drive

urnvs

Recruit
Joined
May 30, 2014
Messages
4
I was wondering if it?s possible to change the gear ratio in the upper drive of a 3868893 (1.79) to the 1.51 ratio, by swapping out a gear or two in the unit?
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
47,306
to go from the 1.79 ratio to the 1.51, you need to change gears in both the upper and lower.

With the SX-M there two popular tooth counts, the 22/23 and the 21/26. Within the 22/23 Upper, you can choose from five different gear ratios. Those are 1.43, 1.51, 1.60, 1.66 and 1.85. As for the 21/26, we carry the 1.79, 1.97 and 2.18 ratios.welcome aboard
 
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