1990 Johnson Evinrude "ES" 40 thru 55 Service Repair Manual, P/N 507872, Page 287Get this manual
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Service Specifications Special Torque Chart
Check Valve Housing Fill Plug Pump Motor Retaining Screws Filter Valve Plug
50-60 inIbs(6-7 Nm) 45-55 inIbs(5-6 Nm) 35-52 inIbs(4-