Service Manual

ISB, ISBe and QSB (Common Rail [...] Marine Vibration Isolator
Section 16 - Mounting Adaptations - Group 16 Page 16-57
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Install
Set the new isolator in place. Check that the isolator is
properly aligned. Reference the Initial Check section in
this procedure for alignment information.
Set the adjusting nut at the approximate height of the
isolator removed.
Replace other isolators that need to be changed using the
same technique.
Install the washer and top nut.
Lower the engine so that its weight is fully supported by
the isolators.
Verify that the isolators are loaded evenly. Depending on
the configuration of the engine, the weight may not be
evenly distributed on all four corners.
The engine will be heavier at either the front or back,
depending the on configuration. Therefore, the isolators
on the heavier end will be compressed more.
Check the snubber gap on all isolators.
If only one isolator or two isolators that are diagonally
across from each other are significantly more
compressed, the loading on the isolators is unbalanced.
Adjust the loading on the isolators by raising or lowering
the adjusting nut on the stud. Raising the adjusting nut will
increase the load. Lowering the adjusting nut will
decrease the load.
The engine should be lifted and the load removed from
the isolator before moving the adjusting nut, to prevent
damage to the threads.
Finishing Steps
WARNING
Batteries can emit explosive gases. To reduce the
possibility of personal injury, always ventilate the
compartment before servicing the batteries. To
reduce the possibility of arcing, remove the negative
(-) battery cable first and attach the negative (-)
battery cable last.
• Align the propeller shaft. Refer to Procedure 016-025
in Section 16.
• Connect the battery cables. Refer to the OEM service
manual.
• Start the engine and check for proper operation.