Reply To: 1957 Evinrude Big Twin 35 Skeg interferes with gears.

[Don]

Well, I haven’t had too many of these apart that far, so am not familiar with the two different washers and their orientation..  But, there is definitely two different part numbers for the washers.

Evinrude Gear Case Parts for 1957 35hp 25532 Outboard Motor (marineengine.com)

 

I know from working on other gearcases that there are definitely two different style thrust washers used and their orientation is critical as well.  I don’t have the manual near me, so can’t provide much info.  I’m betting that Frank has the answer for us….  I guess I get confused seeing that these thrust washers and bearing are over top of the pressed in pinion roller bearing (sandwiched between the pressed in lower pinion bearing and driveshaft needle bearing).

Nonetheless, improper thrust washers, or messed up orientation will affect pinion depth into the gears…