Mercury MerCruiser MCM 454 Mag MPI Service Manual page 162

MIE MODELS - VELVET DRIVE TRANSMISSION
5. If coupling centerlines are not aligned or if coupling faces are more than .003 in. (0.07
mm) out of parallel, adjust engine mounts as follows:
a. TO ADJUST ENGINE UP OR DOWN: Loosen locking nut on mounts requiring
IMPORTANT: Both front mount (or rear mount) adjusting nuts must be turned equally
to keep engine level from side to side.
Typical Mount
b. TO MOVE ENGINE TO THE LEFT OR RIGHT: Loosen clamping bolt and nut on all
Index Index
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adjustment and turn both front mount or rear mount adjusting nuts equally.
a - Locking Nut
b - Adjusting Nut
c - Clamping Bolts and Nuts, With Lockwashers (Two Each On Some Models)
d - Slot Forward (If So Designed - NOT Slotted On This Style Rear Mount)
four mount brackets; move engine to the left or right as necessary to obtain proper
alignment. On mounts which do have a slotted hole, a small amount of adjustment
can be obtained with slot on front end of mounts. Loosen lag screws (which fasten
mounts to engine bed) and move engine, as required. Tighten lag screws securely.
a
b
d
SERVICE MANUAL NUMBER 23
c
90-861326--1 MARCH 1999
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