1992-2000 Mercury Mariner 105-225HP outboards Factory Service Manual, Page 753Get this manual
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4 Stop the engine, turn off the water, and remove the hose couplingReinstall the plug and gasket Jet Drive Removal and Installation
aLocknut (3)Torque to 50 lbft(68.0 Nm)Bolt (1)Apply Loctite 27