Mercury INSTALLATION MANUAL D7.3L D-TRONIC - Manual (Page 25)

D7.3L D-TRONIC DIESEL ENGINES - BRAVO MODELS
Page 25 of 90
Finding Crankshaft Horizontal Centerline (“X” Dimension)
“X” Dimension can be measured by the “90 ° Tool Method” or by the “Tape Measure Method.”
90
°
TOOL METHOD
1. Construct 90 ° tool.
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90
°
b
a
a -
Dimension from Chart Below
b -
Measurement: 4 ft. (1.2 m)
To Lower Drive Unit -
Subtract from dimension “a”.
To Raise Drive Unit -
Add to dimension “a”.
90 ° TOOL VERTICAL DIMENSION CHART
Sterndrive Unit Location
Bravo One/Two/Three 13-9/16 in. (345mm)
IMPORTANT: This dimension should only be raised or lowered after proper testing.
2. Determine “X” Dimension location of crankshaft centerline(s).
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c
a
b c
b
a
Single Engine Dual Engine
a -
Place 90 ° Tool Along Boat Bottom at Vertical Centerline
b -
Point at Which Top of Tool Contacts Transom on Vertical Centerline is Crank-
shaft Horizontal Centerline.
c -
Draw a Line Perpendicular to Vertical Centerline at Crankshaft Horizontal
Centerline.