1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 234Get this manual
COA3482
1361 14Position the small pinion thrust washer with the inside
chamfered diameter facing the pinionOil and install the thrust bearing Install the large thrust washer with chamfered outside edge facing up
1371 15Install the pinion in the gearcase