1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Repair Manual, P/N 520206, Page 175Get this manual
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Service Specifications Special Torque Chart
OMC Nut Lock
OMC Nut Lock OMC Nut Lock 40, 50SPL, 50 Models
Back off nut turn after torquingOMC Special Tools Require