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