Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 151Get this manual
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SERVICE MANUAL NUMBER 24
aLocking NutAdjusting NutClamping Bolt(s) and Nut(s), with Lockwasher(s) bTO MOVE ENGINE TO THE LEFT OR RIGHT: Loosen clamping screw and nut on all four mount brackets;