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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
Pro
p
eller Nuts (Bravo Three)
1
Front 100 136
P
rope
ll
er
N
u
t
s
(B
ravo
Th
ree
)
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.