1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Repair Manual P/N 507947, Page 224Get this manual
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18 Ist the assembIed driveshat it the .t ool basetight preload screw CD glst the dlveshaft utll goove Q) the sig-Idd lug is flush with of threads ight kig ig preload screw5 Rotate the driveshaft sever