1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, P/N 507875, Page 391Get this manual
L!J a-ring back into housing f41 12Install spool valve with correct number of shims, and
f61 13Place one new a-ring (0.732 0.118 in from package "912358," on the spool valve14Place two washers and locknut on spool valveTighten nut securelyrJl 15While pushing on the spool valve with force of three to five pounds, measure the gap between the washers and the spool valve housingConsider this dimension
16To determine the number of shims required for the threaded end of the spool valve, put dimensions (step 4) and (step 15) into this formulaNumber of shims-0.025 0.005 Round to the nearest whole number of shims17Remove locknut and two washersf81 18Install the correct number of shims between the a-ring and washers