Mercury Mariner Outboards 45 Jet 50 55 60 HP Models Service Manual, Page 173Get this manual
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3 Install end cap assembly (lubricate seals with 2-cycle engine oil) to blockApply Perfect Seal to flange of end cap (a) 5 Insert clean bolts (note sizes) and finger tighten6 Torque bolts to 18 lbft(2