1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 12Get this manual
Service Policy When servicing an outboard which is within its normal warranty period or covered by the OMC 1+2TM Extended Protection Plan, repairs should be made using only OMC genuine replacement components or partsIf OMC genuine replacement components or parts are not used, OMC might refuse subsequent warranty claims involving that engine"" When replacement parts are required, use genuine OMC
i parts or parts with equivalent characteristics including