FNM HPEP 225 Installation Manual page 35

Finding Crankshaft Horizontal Centerline ("X" Dimension)
"X" Dimension can be measured by the "90 Degree Tool Method" or by the "Tape Measure
Method."
90 DEGREE TOOL METHOD
1. Construct 90 degree 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.
a – Horizontal Dimension
b – Vertical Dimension: 4 ft. (1.2 m)
90 Degree Tool Vertical Dimension Chart
Sterndrive Unit
a. Place 90 degree tool along boat bottom at vertical centerline.
b. Point at which top of tool contacts transom on vertical centerline is crankshaft hori
zontal centerline.
c. Draw a line perpendicular to vertical centerline at crankshaft horizontal centerline.
Single Engine
a - 90 Degree Tool Along Boat Bottom At Vertical Centerline
b - Contact Point
c - Crankshaft Horizontal Centerline.
Location
13-9/16 in. (345mm)
Dual Engine
35