1989 Johnson/Evinrude Outboards 88 thru 110 150 thru 175 models Service RepaIr Manual P/N 507757, Page 233Get this manual
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1781 34 Pressure and vacuum test the gearcase as follows: INotel Pressure and vacuum test gearcase before filling Remove the drain plug and screw in pressure test gauge Pump pressure up to 3-6 psi (21