Torque specifications, Serial number decal placement, Corrosion protection – Mercury INSTALLATION MANUAL D7.3L D-TRONIC User Manual
Page 6
D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS
Page 6 of 90
Torque Specifications
DESCRIPTION
TORQUE
DESCRIPTION
lb-in.
lb-ft
Nm
Speedometer Pickup Barb Fitting
10-15
1.2-1.6
Exhaust Pipe or Block-off Plate
20-25
27-34
Power Steering Hydraulic Hose Fittings
20-25
27-34
Power Trim Pump Hose Fittings
100-150
11-16
Propeller Nut (Bravo One and Two)
1
55
75
Propeller Nuts (Bravo Three)
1
Front
100
136
Propeller Nuts (Bravo Three)
1
Rear
60
81
Rear Engine Mounts
35-40
47-54
Steering Cable Coupler Nut
35
47
Steering System (Pivot Bolts)
25
34
Sterndrive Unit Fasteners
50
68
Transom Assembly Fasteners
20 25
27-34
Seawater Pickup Fitting
45
5
Power Trim Cylinder Fasteners
Tighten until they bottom out.
1
: Amount specified is MINIMUM.
Serial Number Decal Placement
There are three sets of engine, transom assembly and sterndrive serial number decal strips
provided with each power package. One set should be used for each of the following:
•
Engine Specification Decal
•
Warranty Registration Card
•
Operation and Maintenance Manual identification page.
Corrosion Protection
MerCruiser power packages are equipped with anodes, to help protect them from galvanic
corrosion under moderate conditions. However, for severe conditions, or if using a stainless
steel propeller, it is recommended that a Quicksilver Anti-Corrosion Anode Kit and/or a Mer-
Cathode System be installed (some models have a MerCathode System as standard equip-
ment). A MerCathode Monitor also is available to allow the operator to check the operation
of the MerCathode System with the push of a button. (Refer to “Quicksilver Accessories
Guide” for part numbers.)
Boats which are connected to AC shore power, require additional protection to prevent de-
structive low voltage galvanic currents from passing through the shore power ground wire.
A Quicksilver Galvanic Isolator can be installed to block the passage of these currents while
still providing a path to ground for dangerous fault (shock) currents. (Refer to “Quicksilver
Accessories Guide” for part number.)
IMPORTANT: If AC shore power is not isolated from boat ground, the MerCathode
System and anodes may be unable to handle the increased galvanic corrosion poten-
tial.