1996 Johnson Evinrude "ED" 9.9 thru 30 2-Cylinder Service Repair Manual, P/N 507122, Page 341Get this manual
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If Boat Plate shows U.SCOAST GUARD CAPAC IT IN FORMAT ON MAXHP MAX PE RSONS MAX WEIGHT
I owner tells you "1 hit something rea lIy hard High speed blow to lower unit or, "1 was backing up