Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 307Get this manual
12Torque the bearing carrier retainer to 100 lbft(135.5 Nm) to seat forward gear assembly in gear case NOTE: If the bearing preload tool has not already been set up, see ShaftBearing Preload TooIH, 'Installation' section found on page 6B-38 first2Install dial indicator as shown in the following figure
23355Bearing Carrier Retainer Wrench (91-61069)