1997 Johnson Evinrude "EU" 90 thru 115 90 CV Service Repair Manual, P/N 507267, Page 185Get this manual
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Propeller InstallationV6
7 Wedge block of wood between propeller blade and the anti-ventilation plate
8 Install the propeller nut 70-80 ftIbs(95-105 Nm)
and tighten to torque