1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 65Get this manual
Testing VROI, System Purpose The following procedure is designed to help you isolate defective component in the boat or engine fuel systemThe problem might cause loss of engine performance or, if left unrepaired, might cause serious powerhead damage After you have isolated the component, refer to Servicing, this Section, for specific repair procedures Testing Procedure
p To avoid accidental starting of engine while changing
propellers, twist and remove all spark plug leads
INote under checksInstall the correctenginepropelleratand run the Some require that the be run full throttle loadtest
engine in suitable test tank1Start engine and allow it to reach normal operating temperature