Honda BF115A, BF130A Outboard Motors Shop Manual., Page 404Get this manual
LCD and XCD types 1) Assemble the outer race and the inner race of the new 50 82 21.5 taper bearing[ INNER RACE ]
2) Measure the bearing height (distance F) from the outer race end to the inner race end as shown, and record the measurement
3) Measure the height of the 50 82 21.5 taper bearing inner race (distance J) and record it4) Determine the tolerance between the bearing height (distance F) and inner race height (distanceusing the following formulaFormula: Bearing height (distance F)Inner race height (distance J)Tolerance Example: When the bearing height (distance F) is 21.55 (0.848 in) and the inner race height (distance J) is 21.4 (0.84 in): 21.55-21.40.15 Therefore, the calculation value is 0.15 (0.006 in)5) Cross reference the calculation value and the engagement mark located on the trim tab installation part of the gear case, and select the shim of the appropriate thickness from the shim selection table accordinglyShim type table