Mercury 75 OptiMax Owner's Manual page 115

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Use a dial torque wrench to determine transom strength. If the
bolt or nut continues to turn without the torque reading on the
dial increasing, it is an indication that the transom is yielding. The
load area can be increased by using a larger washer or a
transom reinforcement plate.
a -
Large transom washer
b -
Transom reinforcement plate
1. Apply marine sealer to the shanks of the bolts, not to the
threads.
2. Fasten the outboard with the correct mounting hardware.
Tighten the locknuts to the specified torque.
IMPORTANT: Ensure a minimum of two full threads of the
mounting bolts extend beyond the locknut after tightening. The
locknut must be drawn tight while still engaging the bolt threads
and not contacting the shank of the bolt.
eng
OUTBOARD INSTALLATION
a
105
b
33962

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