1990 Johnson Evinrude "ES" 40 thru 55 Service Repair Manual, P/N 507872, Page 312Get this manual
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22 Install new motor a-ring1221 23 Position the motor on the manifold and install the four screws and lockwashersTighten the screws to 35-52 inIbs(4-6 Nm)1231 24 Oil and place the pump control piston