Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 34Get this manual
6 Remove flywheel nut
Installation IMPORTANT: Inspect flywheel magnets for clinging debrisFailure to remove debris from magnets will result in damage to stator and magnets when outboard is initially started12345Reinstall flywheelTorque fl ywheel nut to 125 ft(169.4 Nm) bReinstall alternator beltPu ll alternator away from fl ywheel until belt deflects 12 in(12.7mm) with 22 lbft(97.9 Nm) side loadTighten tension adjustment bolt [Torque to 175 lbin (19.7 Nm)) and pivot bolt [Torque to 175 lbin(19.7 mIJ
NOTE: belt tensioning 1001 (obtain locally) may also be used to adjust bett lensionAdjust belt tension 10 80 lb(355.8 N)