1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Repair Manual P/N 520204, Page 152Get this manual
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29 Tighten the six main bearing screws in stages to final torque of 144-168 in Ibs(16-19 Nm)Begin with the center screws and work outward in spiral pattern Tighten the smaller crankcase screws to torq